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Nos publicationsDepuis 1985, plus de 250 publications gemmologiques en anglais, français, italien, russe, coréen, espagnol, allemand, chinois… Nous publions dans des revues scientifiques pour scientifiques physiciens (Diamond & Related Materials, Journal of Non-Crystalline Solids...), géologues (Ore Geology Review, American Mineralogist...), pour gemmologues de laboratoire (Gems & Gemology, Journal of Gemmology...) mais aussi des articles de vulgarisation à destination du grand public. Cliquer sur le titre pour lire le résumé. N'hésitez pas à pour obtenir un article complet en pdf. (pour des questions de droits, nous ne sommes pas autorisés à les proposer directement en ligne). 2011Hainschwang T., Fritsch E., Rondeau B., Notari F. (2011) A new defect center in type Ib diamond inducing one phonon infrared absorption: the Y center. Diamond & Related Materials, disponible en ligne depuis nov 2011.Rondeau B., Fritsch E., Mazzero F., Gauthier J.-P. (2011) Gem News International: Sugar-acid treatment of opal from Wollo, Ethiopia. Gems & Gemology, vol. 47, n°4, pp. XXXXX. Pradat T., Rondeau B., Fritsch E. (2011) Gem News International: Chatoyant quartz with cinnabar inclusions. Gems & Gemology, vol. 47, n°4, pp. XXXXX. Fritsch E., Chatagnier P.-Y., Rondeau B., Karampelas S., Gaillou E. (2011) Gem News International: An accidental corundum and lead glass triplet? Gems & Gemology, vol. 47, n°3, pp. 251-252. Sautter V., Lorand J.-P., Cordier P., Rondeau B., Leroux H., Ferraris C., Pont S. (2011) Petrogenesis of mineral micro inclusions in an unusual carbonado. European Journal of Mineralogy, vol. 23, pp. 721-729. Rondeau B., Fritsch E., Mazzero F., Ayalew D., Bodeur Y. (2011) Amazing play-of-color opals from Wollo, Ethiopia; toward a pedogenetic model. Gems & Gemology, vol. 47, n°2, p 112. Fritsch E., Massuyeau F., Rondeau B., Segura O., Hainschwang T. (2011) Advancing the understanding of luminescence in gem materials. Gems & Gemology, vol. 47, n°2, p 123. Rondeau B., Fritsch E., Bodeur Y., Mazzero F., Cenki T., Bekele E., Ayalew D., Gauthier J.-P. (2011) Play-of-color opal at Wegel-Tena, Wollo, Ethiopia. In Color, vol. 17, n°3, pp. 2-13. 2010Mazzero F., Désagulier C., Rondeau B., Ayalew D., Ezezew G., Cenki T., Bekele E. (2010) L’opale du Wollo, Ethiopie : des mines de gisements. Revue de gemmologie a.f.g., vol. 174, pp. 14-20.Fritsch E., Ionescu C., Simon V., Nagy S., Nagy-Pora K., Rotea M. (2010) Gem News International: 5th century garnet jewelry from Romania. Gems & Gemology , vol. 46, n°4, pp. Devouard B., Médard E., Rondeau B., Fritsch E. (2010) Gem News International: Rediscovery of sapphires in Central France. Gems & Gemology , vol. 46, n°4, pp. 320-321. Devouard B., Bornet R., Notari F., Rondeau B., Fritsch E., (2010) Gem News International: Use your cell-phone as a gemological tool. Gems & Gemology , vol. 46, n°2, pp 325-326. Rondeau B., Fritsch E. (2010) La morphologie du corindon. Le Règne Minéral, vol. 93, pp. 24-27. Giuliani G., Lasnier B., Ohnenstetter D., Fallick A.E., Pegere G. (2010) Les gisements de corindon de France. Le Règne Minéral, vol. 93, pp. 5-23. Fritsch E., Gaillou E., Massuyeau F., Rondeau B. (2010) Luminescence of opals: a witness to their geochemistry. Geochimica et Cosmochimica Acta, vol. 74, n°12, p. A307. Rondeau B., Fritsch E., Cenki-Tok B., Mazzero F. (2010) New opals from Wollo, Ethiopia: geochemical characterization. Geochimica et Cosmochimica Acta, vol.74, n°12, p. A880. Hainschwang T., Notari F., Massi L, Armbruster T., Rondeau B., Fritsch E., Nagashima M. (2010) Hibonite: a new gem mineral from Myanmar. Gems & Gemology, vol. 46, n°2, pp. 135-138. Rondeau B., Fritsch E., Gauthier J.-P., Mazzero F., Cenki-Tok B., Bekele E., Gaillou E. (2010) Play-of-color opal at Wegel Tena, Wollo, Ethiopia. Gems & Gemology, vol. 46, n°2, pp. 90-105. Karampelas S., Hardy P., Fritsch E. (2010) A large hydrogen-rich diamond with a cuboid phantom. Gems & Gemology , Vol 46, n°1, pp. 64-65. Karampelas S., Michel J., Zheng-Cui M., Schwarz J.-O., Enzmann F., Fritsch E., Leu L., Krzemnicki M.S. (2010) X-ray computed microtomography applied to pearls: Methodology, advantages, and limitations. Gems & Gemology, vol. 46-2, pp. 122-127. 2009Fritsch E., Notari F., Grobon Caplan C., Hainschwang T. (2009) Letter to the Editor: More on the fluorescence cage. Gems & Gemology, Vol. 45-4, pp. 235 Tay T.-S., Mok P.C., Paul S.L., Paramita M., Arps C.E.S., Atichat W., Fritsch E., Kang W.W., Wijaya K. (2009) Precious opal from Java : Gemmological properties, macro- and nano-structures. The Australian Gemmologist, vol. 23, pp. 513-528. Rondeau B., Mocquet B., Lulzac Y., Fritsch E. (2009) Les nouveau grenats démantoïdes d’Ambanja, Province d’Antsiranana, Madagascar. Le Règne Minéral, vol. 90, pp. 41-46. Fritsch E., Lulzac Y., Rondeau B. (2009) Gem News International: Common opal from Argentina. Gems & Gemology, vol. 45, n°3, pp. 220-221. Karampelas S., Gauthier J-P., Fritsch E., Notari F. (2009) Gem News International: Characterization of some pearls of the Pinnidae family. Gems & Gemology, Vol. 45, n° 3, pp. 221-223. Mocquet B., Lulzac Y., Rondeau B., Fritsch E., Le Quéré J., Mohamady B., Crenn G., Lamiraud C., Scalie S. (2009) Ambanja, premier gisement d'andradite démantoïde gemme à Madagascar. Revue de Gemmologie a.f.g., vol. 169, pp. 4-8. Fritsch E., Feydieu C., Fauran J., Lulzac Y., Rondeau B. (2009) Gem News International: A chalcedony-opal cameo with remarkable inclusions. Gems & Gemology, vol. 45, n°2, pp. 143-144. Fritsch E., Rondeau B. (2009) Gem News International: Rare optical phenomenon in play-of-color opal. Gems & Gemology, vol. 45, n°2, pp. 147-148. Fritsch E., Feydieu C., Fauran J., Lulzac Y., Rondeau B. (2009) Un camée exceptionnel d’opale et de calcédoine. Revue de Gemmologie a.f.g., vol. 168, pp. 4-7. Rondeau B., Fritsch E. Mocquet B., Lulzac Y., (2009) Ambanja (Madagascar)- A new source of gem demantoid garnet. In Color, summer 2009, pp. 22-24. Mocquet B., Lulzac Y., Fritsch E., Rondeau B. (2009) Traitement Zachery des turquoises : méthode d’identification simple fondée sur la microchimie. Revue de Gemmologie a.f.g., vol. 168, pp. 4-7. Mazzero F., Gauthier J.-P., Rondeau B., Fritsch E., Bekele E. (2009) Nuovi giacimenti di opale etiope nella provincia di Welo : prima informazioni. Rivista Gemmologica Italiana, Vol. 4, No. 2, pp. 85-89. Mazzero F., Gauthier J.-P., Rondeau B. , Fritsch E., Bekele E. (2009) Nouveau gisement d'opales d'Ethiopie dans la Province du Welo : premières informations. Revue de Gemmologie a.f.g., vol. 167, pp 4-5. Fritsch E., Rondeau B. (2009) Gemology, the emerging science of gems. Elements, vol. 5, n°3, pp.147-152. Rondeau B., Mazzero F., Bekele E., Gauthier J.-P., Fritsch E. (2009) Gem News International: New play-of-color opal from Welo, Ethiopia. Gems & Gemology, vol. 45, n°1, pp. 59-60. Rondeau B., Fritsch E., Mocquet B., Lulzac Y. (2009) Gem News International: Some unusual dyed imitations. Gems & Gemology, vol. 45, n°1, pp. 74-75. Karampelas S., E. Fritsch, J.-Y. Mevellec, S. Sklavounos, T. Soldatos (2009). Role of polyenes in the coloration of cultured freshwater pearls. European Journal of Mineralogy,Vol. 21, pp. 85-97. Karampelas S., Fritsch E., Rondeau B., Andouce A., Métivier B. (2009) Identification of the endangered pink-to-red Stylaster corals by Raman spectroscopy. Gems & Gemology, vol. 45, n°1, pp. 48-52. 2008Gauthier J.-P., Mazzero F., Mandaba Y., Fritsch E. (2008) L’opale Etiopie : gemmologia ordinaria e caratteristiche eccezionali. Rivista Gemmologica Italiana Vol. 3, No. 2, pp. 85-96.Karampelas S., Fritsch E., Notari F. (2008) Gem News International: Natural pearls of the Veneridae family. Gems & Gemology, Vol. 44, No. 4, pp. 374-375. Karampelas S., Fritsch E. (2008) Spectroscopie de diffusion Raman des perles : identification de la nature de leurs pigments. Revue de Gemmologie A.F.G., No.166, pp. 13-17. Gaillou E., Fritsch E., Notari F. (2008) Photoinduced H1b and H1c centers in some natural treated diamonds. Diamond & Related Materials, vol. 17, pp. 2029-2036. Gaillou E., Fritsch E., Rondeau B., Aguilar-Reyes B., Barreau A., Ostroumov M., Post J. (2008) Common gem opal: An investigation of micro- to nano-structure. American Mineralogist, vol. 93, pp. 1865-1873. Fritsch E. (2008) The Paris Gemmological Meetings – gemstone updates for French speakers. InColor, Fall2008, pp. 36-37. Fritsch E., Karampelas S. (2008) Comment on: Determination of canthaxanthin in the red coral (Corallium rubrum) from Marseille by HPLC combined with UV and MS detection (Cvejic at al. (2007) Mar Biol 152: 855-862). Marine Biology, vol. 154, pp. 929-930. Fritsch E., Karampelas S. (2008) Comment on “Determination of carotenoid as the purple pigment in Gorgonia ventalina sclerites using Raman spectroscopy” [Leverette et al., Spectrochim. Acta A, 69 (2008) 1058-1061]. Spectrochimica Acta part A: molecular and biomolecular spectroscopy, vol. 71, p. 1627. Simonet C., Fritsch E., Lasnier B. (2008) A classification of gem corundum deposits aimed towards gem exploration. Ore Geology Review, vol. 34, pp. 127-133. Rondeau B., Fritsch E., Peucat J.-J., Nordrum F.S., Groat L.A. (2008) Characterization of emeralds from a historical deposit: Byrud (Eidsvoll), Norway. Gems & Gemology, vol. 44, n°2, pp.108-122. Fritsch E., Rondeau B., Mocquet B., Lulzac Y. (2008) Gem News International: “Red andesine” from China: Possible indication of diffusion treatment. Gems & Gemology, vol. 44, n°2, pp. 166-167. Rondeau B., Fritsch E., Lulzac Y., Mocquet B. (2008) Gem News International: Unusual Glass Imitation of Rubellite. Gems & Gemology, vol. 44, n°2, pp. 186-187. Fritsch E., Lulzac Y., Rondeau B., (2008) Gem News International: Tourmalines and their imitations obtained in Kandahar, Afghanistan. Gems & Gemology, vol. 44, n°2, pp. 187-188. Gaillou E., Delaunay A., Rondeau B., Bouhnik-le Coz M., Fritsch E., Cornen G., Monnier C. (2008) The geochemistry of opals as an evidence for their origin. Ore Geology Reviews, vol. 34, pp. 113-126. Rondeau B., Sautter V., Barjon J. (2008) New columnar texture of carbonado: cathodoluminescence study. Diamond & Related Materials, vol. 17, pp. 1897-1901. Arlabosse J.-M., Rondeau B., Fritsch E. (2008) Gem News International: A blue manganaxinite. Gems & Gemology, vol. 44, n°1, p. 81. Hainschwang T., Notari F., Fritsch E., Massi L., Rondeau B., Breeding C.M., Vollstaedt H. (2008) HPHT treatment of CO2 containing and CO2-related brown diamonds. Diamond & Related Materials, vol. 17, pp. 340-351.  2007Karampelas S., Gaillou E., Fritsch E., Duman M. (2007) Gem News International : Color-zoned andradite from Iran, with calcite inclusions. Gems & Gemology, vol. 43, n°1, pp. 65-67.Devouard B., Devidal J.-L., Lulzac Y., Fritsch E., (2007) Gem News International: Pezzotaite from Myanmar. Gems & Gemology, vol. 43, n°1, pp. 70-72. Karampelas S., Mocquet B., Fritsch E. (2007) Gem News International: Otolith pendant. Gems & Gemology, vol. 43 n°4, pp.380-381. Peucat J.-J., Ruffault P., Fritsch E., Simonet C., Lasnier B., Bouhnik Le Coz M. (2007) Ga/Mg ratio as a new geochemical tool to differentiate magmatic from metamorphic blue sapphires. Lithos, vol. 98, pp. 261-274. Rondeau B., Fritsch E., Notari F. (2007) Gem News International: Spurious “spiral phantom” in diamond. Gems & Gemology, vol. 43, n°3, pp. 253-254. Karampelas S., Fritsch E. (2007) Letter to the Editor: pigments in natural-color corals. Gems & Gemology, vol. 43, n° 2, pp. 96-97. Rondeau B. (2007) Letter to the Editor: Proper terminology for diamond morphology. Gems & Gemology, vol. 43 n°2, pp. 96-97. Fritsch E., Hainschwang T., Massi L., Rondeau B. (2007) Hydrogen-related optical centers in natural diamonds: an update. New Diamond and Frontier Carbon Technology, vol. 17, n°2, pp. 63-89. Fritsch E., Massi L. Rossman G.R., Hainschwang T., Jobic S., Dessapt R. (2007) Thermochromic and photochromic behaviour of « chameleon » diamonds. Diamond and Related Materials Vol. 16, pp. 401-408. Karampelas S., Fritsch E., Mevellec J.-Y., Gauthier J.-P., Sklavounos S., Soldatos T. (2007) Determination by Raman scattering of the nature of pigments in cultured freshwater pearls. Journal of Raman Spectroscopy. Vol. 38, No. 2, pp. 217-230. Paris M., Fritsch E., Aguilar-Reyes B.O. (2007) 1H, 29Si and 27Al NMR study of the destabilization process of a paracrystalline opal from Mexico. Journal of Non-crystalline Solids. Vol. 353, pp. 1650-1656. Fritsch E., Rondeau B., Hainschwang T., Quellier M.-H. (2007) A contribution to the understanding of pink color in diamond: the unique, historical “Grand Condé”. Diamond & Related Materials, vol. 16, pp. 1471-1474. Rondeau B., Fritsch E., Moore M., Thomassot E., Sirakian J.-F. (2007) On the growth of natural octahedral diamond upon a fibrous core. Journal of Crystal Growth, vol. 304, pp. 287-293. Karampelas S., Fritsch E., Zorba T., Paraskevopoulos K.M., Sklavounos S. (2007) An update on the separation of natural from synthetic amethysts. Bulletin of the Geological Society of Greece, Vol. 27 Karampelas S., Fritsch E., Sklavounos S., Soldatos T. (2007) Identification of treated-color freshwater cultured pearls. Bulletin of the Geological Society of Greece, Vol. 27 Karampelas S., Fritsch E. (2007) Identification des perles de culture d’eau douce de couleur traitée [en français et en flamand] Gemline, n° 68, pp. 11-17. Fritsch E. (2007) A forecast of the important techniques in the next ten years. Gems & Gemology, Vol. 42, No. 3, pp. 90. Karampelas S., Gaillou E., Fritsch E., Douman M. (2007) Les grenats andradites-demantoides d’Iran : zonage de couleur et inclusions. Revue de Gemmologie a.f.g., n° 160, pp. 14-20. Rondeau B., Delaunay A. (2007) Les tourmalines cuprifères du Nigeria et du Mozambique. Revue de Gemmologie a.f.g., vol. 160, pp.8-13. Rondeau B. (2007) Des couleurs trompeuses. In Roches et Minéraux, Textes et Documents pour la Classe n°930, Centre National de Documentation Pédagogique, pp. 12-15. 2006Singbamroong S. Fritsch E.(2006) Gem News International: Black diamond with unusual growth structures. Gems & Gemology, vol. 42, n°1, pp. 73-74.Hainschwang T., Notari F., Fritsch E., Massi L.(2006) Natural, untreated diamonds showing the A, B and C infrared absorptions (« ABC diamonds »), and the H2 absorption. Diamond and Related Materials, Vol.15, pp.1555-1564. Gaillou E., Delaunay A., Fritsch E., Bouhnik-LeCoz M. (2006) Geologic origin of opals deduced from geochemistry. Gems & Gemology, Vol. 42, No. 3, pp. 107. Massi L., Fritsch E., Rossman G., Hainschwang T., Jobic S., Dessapt R. (2006) Chameleon diamonds : a proposed model to explain thermochromic and photochromic behaviors. Gems & Gemology, Vol. 42, No. 3, pp. 101-102. Karampelas S., Fritsch E., Sklavounos S., Soldatos T. (2006) Identification of pigments in freshwater cultured pearls with Raman scattering. Gems & Gemology, Vol. 42, No. 3, pp. 99-100. Karampelas S., Fritsch E., Zorba T., Paraskevopoulos K.M., Sklavounos S., (2006) A refined infrared-based criterion for successfully separating natural from synthetic amethyst. Gems & Gemology, Vol. 42, No. 3, pp.155-156. Hainschwang T., Fritsch E., Massi L., Breeding C.M., Rondeau B. (2006) Natural “CO2-rich” colored diamonds. Gems & Gemology, vol.42, n°3, p. 97. Rondeau B., Fritsch E. (2006) Some open questions on diamond morphology. Gems & Gemology, vol.42, n°3, pp. 109-110. Rondeau B. (2006) Letter to the Editor: More about Medusa quartz. Gems & Gemology, vol. 42, n°2, p. 97. Fritsch E., Gaillou E., Rondeau B., Barreau A., Albertini D., Ostroumov M. (2006) The nanostructure of fire opal. Journal of Non-Crystalline Solids, vol. 352, pp. 3957-3960. Rondeau B., Lulzac Y., Fritsch E., Guiraud M., Lefevre P., Fransolet A.-M. (2006) Raman investigation of the amblygonite-montebrasite series. The Canadian Mineralogist, vol. 44, pp. 1109-1117. Fritsch E., Rondeau B., Notari F. (2006) Cleavage resistance of plastically deformed natural diamonds revealed by dissolved planar features. Diamond and Related Materials, vol. 15, n°9, pp. 1310-1313. Chalain J.-P., Rondeau B. (2006) Three Historical, "Asteriated", Hydrogen-Rich Diamonds: Growth History and Sector-Dependent Impurity Incorporation, extended abstract. Journal of the Gemmological Association of Hong Kong, vol. 27, pp. 13-15. Rondeau B., Fritsch E., Moore M., Sirakian J.-F. (2006) Morfologia del diamante : combinazione di diversi modi di crescita, i diamanti « coated » e i diamanti asteriati. Rivista Gemmologica Italiana, vol. 1, n°1, pp. 19-24. Rondeau B., Ruffault P. (2006) Gemmes du Mozambique. Revue de Gemmologie a.f.g., vol. 157, pp.8-9. Price M., Walsh K., Rondeau B. (2006) Roches et Minéraux. Guide Nature en Poche, Larousse Ed., 224 p. (traduction). 2005Hyrsl J., Danet F. Fritsch E. (2005) Gem News International: Bismuthinite inclusions in rose quartz from Madagascar. Gems & Gemology, vol. 41, n°2, pp. 181-182. Fritsch E. (2005) More on spectroscopy of yellow diamonds. Gems & Gemology, Vol. 41, No. 4, pp. 297. Massi L., Fritsch E., Collins A.T., Hainschwang T., Notari F. (2005) The « amber centres » and their relation to the brown colour in diamond. Diamond and Related Materials, Vol. 14, pp. 1623-1629. Hainschwang T., Simic D., Fritsch E., Deljanin B., Woodring S., Delre R. (2005) A gemological study of a collection of chameleon diamonds. Gems & Gemology, Vol. 41, No. 1, pp. 20-35. Karampelas S., Fritsch E., Zorba T., Paraskevopoulos K.M., Sklavounos S. (2005) Distinguishing natural from synthetic amethysts : the presence and true shape of the 3595 cm-1 peak. Mineralogy and Petrology, Vol. 85, pp. 45-52. Rondeau B., Macri M., Fritsch E. (2005) Gem News International: "Medusa quartz“ with gilalite inclusions. Gems & Gemology, vol. 41, n°3, pp. 271-272. Fritsch E., Moore M., Rondeau B., Waggett R. (2005) X-ray topography of a natural twinned diamond of unusual pseudo-tetrahedral morphology. Journal of Crystal Growth, vol.280, n°1-2, pp. 279-285. Rondeau B., Fritsch E., Moore M., Sirakian J.-F. (2005) Morphologie du diamant : combinaison de plusieurs modes de croissance. Les diamants "coated" et les diamants astériés. Revue de Gemmologie a.f.g., n°154, pp. 13-17. Rondeau B., Fritsch E., Moore M., Sirakian J.-F. (2005) Diamants cubiques ou presque cubiques : quelques définitions utiles sur la morphologie. Revue de Gemmologie a.f.g., n°153, pp. 13-16. Aguilar Reyes B.O, Ostrooumov M., Fritsch E. (2005) Estudio mineralogico de la desestabilizacion de opalos mexicanos. Revista Mexicana de Ciencas Geologicas, vol. 22, No. 3, pp. 391-400. Peucat J.-J., Ruffault P., Fritsch E., Simonet C., Lasnier B., Bouhnik Le Coz M. (2005) Un nouvel outil de reconnaissance des saphirs bleus basaltiques et métamorphiques : le rapport Ga/Mg. Revue de gemmologie a.f.g., No. 153, pp. 8-12. 2004Fritsch E. (2004) Gem News International: Colored cubic zirconia Buddha carving. Gems & Gemology, vol. 40, n°2, pp. 177. Gaillou E., Mocquet B., Fritsch E. (2004) Gem News International: A new gem material from Madagascar. Gems & Gemology, vol. 40, n°4, pp. 339-340. Mocquet B., Lulzac Y., Fritsch E. (2004) Gem News International: Jeremejevite from Madagascar. Gems & Gemology, vol. 40, n°4, pp. 340-341. Fritsch E., Lulzac Y. (2004) Gem News International: Arizona peridot with unusual inclusions. Gems & Gemology, vol. 40, n°4, pp. 351-352. Gauthier J.-P., Fritsch E., Barreau A., Aguilar-Reyes B. & Lasnier B. (2004) Phase de Laves dans la première opale CT bidisperse. Comptes Rendus de l’Académie des Sciences – Géosciences, Vol. 336, No. 3, pp. 187-196. Simonet C., Paquette J.-L., Pin C., Lasnier B., Fritsch E. (2004) The Dusi (Garba Tula) sapphire deposit, Central Kenya – a unique Panafrican corundum-bearing monzonite. Journal of African Earth Sciences, Vol. 38, pp. 401-410. Rondeau B., Fritsch E., Guiraud M., Renac C. (2004) Opals from Slovakia ("Hungarian" opals): a re-assessment of the conditions of formation. European Journal of Mineralogy, vol. 16, pp. 789-799. Rondeau B., Fritsch E., Guiraud M., Chalain J.-P., Notari F. (2004) Three historical "asteriated" hydrogen-rich diamonds : growth history and sector-dependent impurity incorporation. Diamond and Related Materials, vol. 13, n°9, pp. 1658-1673. Fritsch E., Gaillou E., Ostroumov M., Rondeau B. Barreau A. (2004) Relationship between nanostructure and optical absorption in fibrous pink opals from Mexico and Peru. European Journal of Mineralogy, vol. 16, pp. 743-752. Gauthier J.-P., Mazzero F., Mandaba Y., Fritsch E. (2004) L'opale d'Ethiopie: gemmologie ordinaire et caractéristiques exceptionnelles. Revue de Gemmologie a.f.g., No. 149, pp. 15-23. Fritsch E. (2004) Les macles de la staurotide, ou un et un font sept (ou peut-être huit)... Le Règne Minéral, No. 56, pp. 37-40. Fritsch E., Berthier S. (2004) Les opales de coléoptères. Revue de Gemmologie a.f.g., No. 150, pp. 22-23. Karampelas S., Fritsch E. (2004) Infrared absorption as a useful tool to separate natural from synthetic amethysts. Proc. Mitt. Osterr. Mineral. Ges. , 149 Fritsch E., Notari F., Respinger A., Grobon C. (2004) An exceptional chameleon diamond. Dans "In the Kingdom of Diamonds", H. Bari éditeur, National Natural History Museum, Doha, Qatar, pp. 29-34. 2003Fritsch E. (2003) Gem News International: Emeralds from Madagascar with strong blue/green dichroism. Gems & Gemology, vol. 39, n°4, pp. 331. Fritsch E. (2003) Gem News International: Chatoyant glass cabochons from China. Gems & Gemology, vol. 39, n°4, pp. 339-340. Fritsch E., Wéry J., Jonusauskas G., et Faulques E. (2003) Transient photoluminescence from highly disordered silica-rich natural phases with and without nanostructures. Physics and Chemistry of Minerals, Vol. 30, No. 7, pp. 393-400. Rondeau B., Notari F., Giuliani G., Michelou J.-C., Martins S., Fritsch E., Respinger A. (2003) La mine de Piteiras, Minas Gerais, nouvelle source d'émeraude de belle qualité au Brésil. Revue de Gemmologie a.f.g., n°148, pp. 9-25. Fritsch E., Chalain J.-P., Hänni H., Devouard B., Chazot G., Giuliani G., Schwarz D., Rollion-Bard C., Garnier V., Barda S., Ohnenstetter D., Notari F., Maitrallet P. (2003) Le nouveau traitement produisant des couleurs orange à jaune dans les saphirs. Revue de Gemmologie a.f.g. , No. 147, pp. 11-23. Notari F., Grobon C., Fritsch E. (2003) UV fluorescence may be an efficient way to identify Be-diffused corundum. Jewellery News Asia, No. 229, pp. 80-82-84. Gauthier J.-P., Fritsch E. (2003) Une rareté structurale: l'opale noble bidisperse. Revue de Gemmologie a.f.g., No. 148, pp. 32-35. Notari F., Fritsch E., Grobon C. (2003) Comment l'observation de la luminescence (fluorescence) peut aider à l'identification des corindons jaunes, rose orangé et orange, traités par diffusion du béryllium. Revue de Gemmologie a.f.g., No. 148, pp. 40-43. Fritsch E., Notari F., Grobon C. (2003) Checking sapphires for beryllium diffusion. Professional Jeweler, Vol. 6, No. 11, pp. 36-37. Deljanin B., Hainschwang T. & Fritsch E. (2003) Update on study of CVD diamonds. Jewellery News Asia, No. 231, pp. 134-139. Gaillou E. (2003) Les saphirs du Massif Central : Etude minéralogique des saphirs du Sioulot, du Mont Coupet et du Menoyre - Détermination de leur origine. Mémoire de DEA, université de Clermont-Ferrand, 66 pages. 2002Ostroumov M., Fritsch E., Faulques E., Chauvet O. (2002) Etude spectrométrique de la lazurite du Pamir. Canadian Mineralogist, Vol. 40, pp. 885-893. Notari F., Grobon C., Fritsch E. (2002) Observation des émeraudes traitées en luminescence UVISIO. Quelle mention attribuer aux émeraudes après suppression des résines synthétiques de leurs fissures ? Revue de gemmologie a.f.g., No. 144, pp. 27-31. Sunagawa I., Fritsch E. (2002) La forme des cristaux. Dossier Hors Série Pour la Science « les diamants » Avril/Juin 2002, pp. 34-39. Fritsch E., J.E. Shigley (2002) Des diamants bien traités. Dossier Hors Série Pour la Science « les diamants » Avril/Juin 2002, pp. 78-83. Fritsch E., J.E. Shigley (2002) La couleur des diamants. Dossier Hors Série Pour la Science « les diamants »Avril/Juin 2002, pp. 84-91. Fritsch E., J.E. Shigley, S.F. McClure (2002) Gemmologie du diamant : nouvelles du front. Revue de gemmologie a.f.g., No. 145-146, pp. 22-24. Parodi G.C., Fritsch E. (2002) Natura del diamante (en italien), Dans "Diamanti : Arte, Storia, Scienza", De Luca editori d’Arte, Rome, pp. 48-60. Parodi G.C., Fritsch E. (2002) Gemologia pratica del diamante (en italien), Dans "Diamanti : Arte, Storia, Scienza", De Luca editori d’Arte, Rome, pp. 61-65. Fritsch E. (2002) Un mot sur la bénitoïte gemme. Le Règne Minéral, No. 48, pp. 22. Fritsch E., Ostrooumov M., Rondeau B., Barreau A., Albertini D., Marie A.-M., Lasnier B., Wery J. (2002) Mexican gem opals : nano- and micro-structure, origin of colour, comparison with other common opals of gemmological significance. Australian Gemmologist, vol. 21, pp. 230-233. Fritsch E., Rondeau B., Notari F., Michelou J.-C., Devouard B., Peucat J.-J., Chalain J.-P., Lulzac Y., De Narvaez D., Arboleda C. (2002) Les nouvelles mines d'émeraude de La Pita (Colombie), 2nde partie. Revue de Gemmologie a.f.g. n° 144, pp. 13-19. 2001Lasnier B., Simonet C. (2001) The sapphirine-ruby connection: new occurrence in an ornamental rock named "tutti frutti". 28th International Gemmological Conference - Spain - 06-08/10/2001.Faulques E., Fritsch E., Ostroumov M. (2001) Spectroscopy of natural silica-rich glasses. Journal of Mineralogical and Petrological Sciences, Vol. 96, pp. 120-128 Fritsch E., Mihut L., Baibarac M., Baltog I., Ostrooumov M., Lefrant S., Wery J. (2001) Luminescence of oxidized porous silicon : surface-induced emissions from disordered silica micro- to nano-structures. Journal of Applied Physics, Vol. 90, No. 9, pp. 4777-4782. Fritsch E. (2001) Symposium en l’honneur du professeur H. BANK à Idar Oberstein. Revue de gemmologie a.f.g., No. 141-142, pp. 6-7. Massi L., Fritsch E. (2001) Les corindons diffusés. Revue de gemmologie a.f.g., No. 141-142, pp. 18-29. David C., Fritsch E. (2001). Identification du traitement thermique à haute température des corindons par spectrométrie infra-rouge. Revue de gemmologie a.f.g., No. 141-142, pp. 27-31. Chalain J.P., Fritsch E., Hänni H.A. (2001) Diamants de type IIa et traitement HPHT : Identification. Revue de gemmologie a.f.g., No. 141-142, pp. 50-53. Fritsch E., Deljanin B. (2001) Les diamants de type I traités à HPHT : Novatek, General Electric, russes et suédois. Revue de gemmologie a.f.g., No. 141-142, pp. 54-57. Fritsch E., Rossman G.R. (2001) L’origine de la couleur dans les gemmes. 3ème partie. Revue de gemmologie a.f.g., No. 141-142, pp. 65-74. Chalain J.-P., Hänni H.A., Fritsch E. (2001) Detection of GEPOL treated diamonds. The Singaporean Gemologist, Vol. 8, No. 1, pp. 9-10. Fritsch E. (2001) L’origine de la couleur dans les minéraux. dans Ecole de printemps 2001 - la couleur des matériaux. Conservatoire des ocres et pigments appliqués. Roussillon en Provence, 10 pages non numérotées. Fritsch E., Rossman G.R. (2001) L’origine de la couleur dans les gemmes: 4ème partie. Revue de gemmologie a.f.g., No. 143, pp.26-37. Bari H., Fritsch E. (2001) Histoires naturelles du diamant. Dans "Diamants. Au coeur de la terre, au coeur des étoiles, au coeur du pouvoir". Adam Biro Editeur, Paris, pp. 20-43. Traduit en anglais dans "Diamonds, in the heart of the Earth, in the heart of stars, at the heart of power" (2001), Vilo – Adam Biro, Paris, pp. 20-43. Fritsch E. (2001) Tous les diamants ne sont pas égaux, ou gemmologie du diamant. Dans "Diamants. Au coeur de la terre, au coeur des étoiles, au coeur du pouvoir". Adam Biro Editeur, Paris, pp.160-175. Traduit en anglais dans "Diamonds, in the heart of the Earth, in the heart of stars, at the heart of power" (2001), Vilo – Adam Biro, Paris, pp. 160-175. Fritsch E. (2001) La gemmologie du diamant. Bulletin de liaison de la Société Française de Minéralogie Cristallographie, Vol. 123, No. 2, pp. 31-37. Fritsch E. (2001) Diamants: au coeur de la Terre, au coeur des étoiles, au coeur du pouvoir. Résumé d’exposition. Universalia 2001. Encyclopedia Universalis, Paris. Deljanin B., Fritsch E. (2001) Another diamond type is susceptible to HPHT: rare type IaB diamonds are targeted. Professional Jeweler, Octobre 2001, pp. 26-29. Fritsch E., Chalain J.-P., Hänni H. (2001) Identification of GEPOL diamonds, Australian Gemmologist, Vol. 21, No. 4, pp. 172-177. Ostroumov M., Victoria Morales A. , Chauvet O., Fritsch E. (2001) Algunas consideraciones sobre la naturaleza de color de topacios volcanicos (Mexico). Boletin de la Sociedad Espanola de Mineralogia, Vol. 24, pp. 33-41. 2000Chalain J.-P., Fritsch E., Hänni H.A. (2000) Identification of GEPOL diamonds : a second step. Journal of Gemmology, Vol. 27, No. 2, pp. 73-78. Hänni H., Chalain J.-P., Fritsch E. (2000) New spectral evidence for GEPOL diamond detection. Gems & Gemology, Vol. 36, No. 2, pp. 96-97. Giuliani G., Chaussidon M., Schubnel H.-J., Piat D., Rollion-Bard C., France-Lanord C., Giard D., De Narvaez D., Rondeau B. (2000) Oxygen isotopes and Emerald Trade Routes since Antiquity. Science, vol. 287, pp. 631-633. Giuliani G., Chaussidon M., Schubnel H.-J., Piat D., Rollion-Bard C., France-Lanord C., Giard D., De Narvaez D., Rondeau B. (2000) Historique des gisements d'émeraude et identification des émeraudes anciennes. Revue de gemmologie a.f.g., vol. 140, pp. 32-35. Chalain J.-P., Fritsch E., Hänni H.A. (2000) Zur Bestimmung von GEPOL diamanten: erste Erkenntnisse. Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 49, No. 1, pp. 19-30. Fritsch E., Rossman G.R. (2000) La couleur dans les gemmes. Pour la Science, Dossier hors série, Avril 2000, pp. 36-41. Chalain J.-P., Fritsch E., Hänni H.A. (2000) Identification des diamants GEPOL: deuxième étape. Revue de gemmologie a.f.g., No. 138-139, pp. 24-29. Ostroumov M., Lasnier B., Fritsch E., Lefrant S. (2000) Spectres diagnostiques de réflexion des minéraux dans le domaine infrarouge lointain. Revista Mexicana de Ciencias Geologicas, Vol. 17, No. 2, pp. 163-167. Rondeau B. (2000) Daubenton et la Minéralogie au XVIIIème siècle. In Catalogue de l'exposition Daubenton (Montbard, Côte d'or), Ville de Montbard-Musée Buffon ed. p. 5. Rondeau B. (2000) René-Just Haüy und die Kristallographie des Diamanten. In Funkelnde Diamanten, Mineralientage München 2000, pp. 126-127. Moëlo Y., Lasnier B., Palvadeau P., Léone P., Fontan F. (2000) La lulzacite, Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10, un nouveau phosphate de strontium (Saint-Aubin-des-Châteaux, Loire-Atlantique, France). Comptes-Rendus de l'Académie des Sciences, vol. 330, pp.317-324. 1999Scarratt K., Bosshart G., DelRe N., Fritsch E., Jobbins A., King J., Zucker B. (1999) « Orange Pearls » from the Melo volutes (Marine Gastropods). A gemological study of a unique collection with data from other examinations. In "The Pearl and the Dragon, a study of Vietnamese Pearls and the History of the Oriental Pearl Trade", Editeur Derek J. Content, Houlton, Maine, USA, pp. 79-108. Shigley J.E., Fritsch E. (1999) Synthetic gem diamonds and their gemological identification. Dans "Science & Technology of Diamond", Editeur G.S. Bhatnagar, Cambridge International Science Publishing, Cambridge, U.K., pp. 77-93. Fritsch E., McClure S.F., Ostrooumov M., Andres Y., Moses T., Koivula J.I., Kammerling R.C. (1999) The identification of Zachery-treated turquoise, Gems & Gemology, Vol. 35, No. 1, pp. 4-16. Elen S., Fritsch E. (1999) The separation of natural from synthetic colorless sapphire, Gems & Gemology, Vol. 35, No. 1, pp.30-41 Liu Y., Shigley J.E., Fritsch E., Hemphill S. (1999) A colorimetric study of the alexandrite effect in gemstones. Journal of Gemmology, Vol. 26, No. 6, pp. 371-385. Ostrooumov M., Fritsch E., Lasnier B., Lefrant S. (1999) Spectres Raman des opales : aspect diagnostique et aide à la classification. European Journal of Mineralogy, Vol. 11, pp. 899-908. Fritsch E., Wery J., Ostrooumov M. (1999) Classification of gem opals using Raman spectroscopy. Gems & Gemology, Vol. 30, No. 3, pp. 145. Giuliani G., Chaussidon M., Schubnel H.-J., Piat D., Rollion-Bard C., France-Lanord C., Giard D., De Narvaez D., Rondeau B. (1999) Historique des gisements d'émeraude et identification des émeraudes anciennes. Revue de gemmologie a.f.g., vol. 138-139, pp. 22-23. Fritsch E., Carrère P., Moses T. (1999) La détection du Jade B: comparaison des différentes méthodes de laboratoire. Revue de gemmologie a.f.g., No.136, pp. 14-18. Fritsch E., Maitrallet P., Hemond G., Lasnier B., Notari F., Froyer G., Louarn G. (1999) Première caractérisation du Permasafe, nouveau matériau de remplissage des fractures utilisé pour les émeraudes. Revue de gemmologie a.f.g. ,No. 136, pp. 44-46. Fritsch E., Rossman G.R. (1999) L’origine de la couleur dans les gemmes: 1ère partie. Revue de gemmologie a.f.g., No. 137, pp. 10-16. Chalain J.-P., Fritsch E., Hänni H.A. (1999) Détection des diamants GEPOL: une première étape. Revue de gemmologie a.f.g., No. 138-139, pp. 24-29. Traduit en anglais « Detection of GEPOL diamonds, a first stage », idem, pp. 30-33. Fritsch E. , Rossman G.R. (1999) L’origine de la couleur dans les gemmes: 2 ème partie, Revue de gemmologie a.f.g., No. 138-139, pp. 55-61. Republiée pour cause d’erreur de l’imprimeur dans No. 140. Fritsch E., Lasnier B., Ostrooumov M., Wery J. (1999) Classification of gem opals using Raman spectroscopy. Indian Gemmologist, Vol. VIII, pp. 39-40. Peucat J.-J., Lasnier B., Fritsch E., Le Coz - Bouhnik M., Boudard M. (1999) A new method for chemical analysis of gems: ICPMS-LA. Example of emeralds and andalusite. Indian Gemmologist, Vol. VIII, pp. 44. Ostroumov M., Fritsch E., Lefrant S. (1999) Primeros datos sobre la espectrometria Raman de los opalos. Revista Mexicana de Ciencias Geologicas, Vol. 16, No. 1, pp. 73-80. Fritsch E. (1999) Comprendre les macles : une question de symétrie. Le règne Minéral, No. 29, pp. 47-51. Parodi G.C., Rondeau B., Cochet B. (1999) Les béryls bleus de l'aiguille de Charmoz. Le règne Minéral, n° Hors-Série V, pp. 57-58. Fritsch E., Rondeau B., Ostrooumov M., Lasnier B., Marie A.M., Barreau A., Wery J., Connoué J., Lefrant S. (1999) Découvertes récentes sur l’opale. Revue de gemmologie a.f.g. vol. 138/139, pp. 34-40. 1998D. Giard (Editeur), G. Giuliani, A. Cheilletz, E. Fritsch et E. Gonthier (coéditeurs) "L’émeraude", (1998), Association Française de Gemmologie, Paris, France. 235 pages. Fritsch E. (1998) The nature of color in diamonds. Dans "The nature of diamonds", Editeur G. Harlow, American Museum of Natural History et Cambridge University Press, Cambridge, Grande-Bretagne, pp. 23-47. Maclear R.D., Connell S.H., Doyle B.P., Machi I.Z., Butler J.E., Sellschop J.P.F., Naidoo S.R., Fritsch E. (1998) Quantitative trace hydrogen distributions in natural diamond using 3D-micro-ERDA microscopy. Nuclear Instruments and Methods in Physics Research B, Vol. 136-138, pp. 579-582. Muhlmeister S., Fritsch E., Shigley J.E., Devouard B., Laurs B. (1998) Separating natural and synthetic rubies on the basis of trace element chemistry. Gems & Gemology, Vol. 34, No. 2, pp. 80-101. Troisième prix, Dr. Edward J. Gübelin most valuable article award, Gems & Gemology Reinitz I.M., Fritsch E., Shigley J.E. (1998) An oscillating visible light optical center in some natural green to yellow diamonds. Diamond and Related Materials, Vol. 7, pp. 313-316. Balitsky V.S., Makhina I.B., Prygov V.I., Mar’in A.A., Emel’chenko A.G., Fritsch E., McClure S.M., Lu T., DeGhionno D., Koivula J.I., Shigley J.E. (1998) Russian synthetic pink quartz. Gems & Gemology, Vol. 34, No. 1, pp. 34-43. Fritsch E. (1998) La 26ème Conférence Gemmologique en Allemagne. Revue de gemmologie a.f.g. No. 133, pp. 4-6. Fritsch E. (1998) Une journée diamant exceptionelle. Revue de gemmologie a.f.g. No. 133, pp. 7-9. Fritsch E., Shigley J.E., Lasnier B. (1998) Le traitement des gemmes. Pour la Science, No. 245, pp. 66-73. Fritsch E., Moon M., Wu S.T., Liu Y., Park J.-S. (1998) Les nouvelles émeraudes synthétiques d’Asie: émeraude synthétique hydrothermale chinoise, émeraudes synthétiques par dissolution anhydre coréenne et taïwanaise, « l’Emeraude », Editeur D. Giard, coéditeurs G. Giuliani, A. Cheilletz, E. Fritsch et E. Gonthier, Association Française de Gemmologie, Paris, France, pp. 131-138. Spiesser M., Fritsch E. (1998) Découverte du chrome et du béryllium dans l’émeraude par Nicolas-Louis Vauquelin - 200e anniversaire. Revue de gemmologie a.f.g., numéro spécial « l’Emeraude », Nos. 134-135, pp. 43-46. Egalement dans le livre « L’Emeraude », voir ci dessus, pp. 43-46. Marie A.-M., Ostrooumov M., Wery J., Fritsch E., Lasnier B., Lefrant S. (1998) Electron microscopy of common opal structure. Electron Microscopy 98, Symposium II, Vol. IV, pp.145-146. Ostrooumov M., Fritsch E., Lasnier B., Lefrant S. (1998) Espectros diagnosticos de reflexion de minerales en la region infraroja lejana. Boletin de la Sociedad Espanola de Mineralogia, Vol. 21, pp. 147-152 Grenier de Cardenal L., Fritsch E., Lasnier B. (1998) Du rêve à la réalité des traitements. Catalogue de l’exposition Des pierres... précieuses et mystérieuses, p. 12-13. 1997Fritsch E., Shigley J.E., Park J.-K., Moon M. (1997) Synthesis technology for single crystal diamond and distinction methods of artificially synthesized diamond from natural diamond (en coréen). Analytical Science and Technology, Vol. 10, No. 4, pp. 73A-80A Shigley J.E., Moses T.M., Reinitz I., Elen S., McClure S.F., Fritsch E. (1997) Gemological properties of near colorless synthetic diamonds. Gems & Gemology, Vol. 33, No. 1, pp. 42-53. Troisième prix, Dr. Edward J. Gübelin most valuable article award, Gems & Gemology Fritsch E. (1997) Alerte aux chrysoberyls radioactifs. Revue de gemmologie a.f.g. No. 132, pp. 7. 1996Balitsky V.S., Makhina I.B., Emel’chenko A.G., Mar’in A.A., Shigley J., Fritsch E.,Koivula J. (1996) Formation of rose phosphorus-bearing quartz and causes of its rarity nature : an experimental study (en russe). Geochimiya, No. 11, pp. 1074-1081. Koivula J.-I., Kammerling R.C., DeGhionno D.G., Reinitz I., Fritsch E., Johnson M.L.(1996) Gemological investigation of a new type of Russian hydrothermal synthetic emerald. Gems & Gemology ,Vol. 32, No. 1, pp. 32-39. Troisième prix, Most valuable article of the year award, Gems & Gemology. Lenef A., Brown S.W., Redman D.A., Rand S.C., Shigley J.E. and Fritsch E. (1996) Electronic structure of the N-V center in diamond: Experiments. Physical Review B, Vol. 53, No. 20, pp. 13427-13440. Fritsch E. (1996) Diamant : formes ordinaires et extraordinaires. Bulletin de l’A.MI.S., No. 17, pp. 3-12. Fritsch E. (1996) Chinese synthetics: the anonymous crowd. Jewelers’ Circular-Keystone. Vol. 167, No. 3, pp. 51-52. 1995Fritsch E., Shigley J.E., Moses T., Rossman G.R., Zucker B., Balfour I. (1995) A Green Diamond. Editeur D.J. Content, W.S. Maney & Son Ltd., Leeds, Grande-Bretagne, 42 pages. Shigley J.E., Fritsch E., Reinitz I., Moses T.M.(1995) A chart for the separation of natural and synthetic diamonds. Gems & Gemology, Vol. 31, No. 4, pp.256-264. Deuxième prix, Most valuable article of the year award, Gems & Gemology. Johnson M.L., Mercer M.E., Fritsch E., Maddison P., Shigley J.E. (1995) ”Ti-sapphire” : Czochralski-pulled synthetic pink sapphire from Union Carbide. Gems & Gemology, Vol. 31, No.3, pp. 188-195. Lasnier B. (1995) The Raman microprobe: a new gemmological tool. The Australian Gemmologist, vol. 19, n°1, pp. 5-7. Liu Y., Shigley J.E., Fritsch E., Hemphill S.(1995) Relation between the crystallographic orientation and the « alexandrite effect » in synthetic alexandrite. Mineralogical Magazine. Vol. 59, pp. 111-114. Liu Y., Shigley J.E., Fritsch E., Hemphill S.(1995) Abnormal hue-angle change of the gemstone tanzanite between CIE illuminants D65 and A in CIELAB color space. Color Research and Application.Vol. 20, No. 4, pp.245-250. Fritsch E. (1995) Spectroscopies commonly applied to gem identification. Analusis, Vol. 23, No. 1, pp. M37-38. Kammerling R.C., Fritsch E., Koivula J.I. (1995) Swarogem’s new synthetic ruby with induced fingerprints. Jewellery News Asia,No. 127, pp. 70-72-74-76. Fritsch E., McClure S.F. (1995) Synthetic amethyst: Features of new type from Russia. Jewellery News Asia, No. 129, pp. 90-92. Shigley J.E., Fritsch E., Koivula J.I. Kammerling R.C. (1995) Identifying features of synthetic diamonds. Rapaport Diamond Report. Vol. 18, No. 20, pp. 4-5 et supplément couleur. Fritsch E., Kammerling R.C., Koivula J.I. (1995) An examination of Swarogreen - a new imitation emerald from Austria. The Australian Gemmologist, Vol. 19, No. 1, pp.15-18. Kammerling R.C, Crowningshield R., Reinitz I., Fritsch E. (1995) Separating natural pinks from their treated counterparts. Diamond World Review, No. 88, pp. 86-89. 1994Koivula J.I., Kammerling R.C., Fritsch E. (1994) Two interesting "double star" sapphires. The Australian Gemmologist, Vol. 18, No. 7, pp. 235-236. Kammerling R.C., Koivula J.I., Fritsch E. (1994) An examination of Chatham flux grown synthetic pink sapphires. Journal of Gemmology, Vol. 24, No. 3, pp. 149-154. Fritsch E. (1994) Type-B jadeite: new polymers and estimating amount of wax. Jewellery News Asia, No. 123, pp. 106-110. Shigley J.E., Fritsch E., Liu Y. (1994) Gemological Research Update (en Chinois), China Gems, Vol. 3, No. 4, pp. 49-51. Gorton A., Fritsch E. (1994) Identifying Russian synthetic diamonds. The Journal of the Gemmological Association of Hong Kong, Vol. XVII, pp. 57-62. Liu Y., Shigley J.E., Fritsch E., Hemphill S.(1994) The « alexandrite effect » in gemstones. Color Research and Application, Vol. 19, No. 3, pp. 186-191. Kammerling R.C., McClure S.F., Johnson M.L., Koivula J.I., Moses T., Fritsch E., Shigley J.E.(1994) An update on filled diamonds; Identification and durability. Gems & Gemology, vol. 30, no. 3, pp. 142-177. Fritsch E., Shigley J.E. (1994) Origin of the purple and pink colors of manganoan sugilite from the Wessels mine, South Africa. Mineralogical Magazine, Vol. 58, pp. 681-685. 1993Fritsch E., Shigley J.E. (1993) The separation of natural from synthetic gem-quality diamonds on the basis of crystal growth criteria. Journal of Crystal Growth, Vol. 128, pp. 425-428. Rooney M.L.-T., Welbourn C.M., Shigley J.E., Fritsch E., Reinitz I. (1993) DeBeers near-colorless to blue experimental synthetic diamonds. Gems & Gemology, Vol. 29, No. 1, pp. 38-45. McClure S.F., Kammerling R.C., Fritsch E. (1993) Update on diffusion-treated corundum, red and other colors. Gems & Gemology, Vol. 29, No. 1, pp. 16-29. Fritsch E., Phelps A. (1993) Type IIb diamond thin films deposited onto near-colorless natural gem diamonds. Diamond and Related Materials. Vol. 2, Nos. 2-4, pp. 70-74. Muhlmeister S., Koivula J.I., Kammerling R.C., Smith C.P., Fritsch E., Shigley J.E. (1993) Flux-grown synthetic red and blue spinels from Russia. Gems & Gemology, Vol. 29, No. 2, pp. 81-100. Moses T.M., Reinitz I., Fritsch E., Shigley J.E. (1993) Two treated-color synthetic red diamonds seen in the trade. Gems & Gemology, Vol. 29, No. 3, pp. 182-190. Shigley J.E., Fritsch E., Reinitz I. (1993) Two near-colorless General Electric Type IIa synthetic diamond crystals. Gems & Gemology, Vol. 29, No. 3, pp. 191-197. Fritsch E., Mercer M. (1993) Blue color in sapphire caused by Fe2+/Fe3+ intervalence charge transfer. Gems & Gemology, Vol. 29, No. 3, pp. 151 et 226. Shigley J.E., Fritsch E., Koivula J.I., Sobolev N.V., Malinovsky I.Y., Pal’yanov Y.N. (1993) The gemological properties of Russian gem-quality synthetic yellow diamonds. Gems & Gemology, Vol. 29, No. 4, pp. 228-249. Shigley J.E., Fritsch E. (1993) A notable red-brown diamond. Journal of Gemmology, Vol. 23, No. 5, pp. 259-266. Kammerling R.C., Koivula J.I., Kane R.E., Maddison P., Shigley J.E., Fritsch E. (1993) Examining Opticon. Colored Stone, Janvier-Février 1993, pp. 365 & 380. Shigley J.E., Fritsch E., Kammerling R.C., Moses T.M. (1993) Identifying faceted gem-quality synthetic diamonds. Rapaport Diamond Report, Vol. 16, No. 26, pp. 10-13. Fritsch E. (1993) "GIA says AGIL's findings insufficient". Letter to the editor. Jewellery News Asia, Septembre 1993, pp. 86 & 90. Fritsch E., Scarratt K. (1993) Gemmological properties of type Ia diamonds with an unusually high hydrogen content. Journal of Gemmology, Vol. 23, No. 8, pp. 15-24. Shigley J.E., Fritsch E., Kammerling R.C., Moses T.M. (1993) Identifying faceted gem-quality synthetic diamonds. New York Diamonds, No. 22, pp. 48-54. Shigley J.E., Fritsch E., Kammerling R.C., Moses T.M.(1993) Gemological means described to detect synthetic diamonds. Diamond World Review, No. 77, pp. 42-50. 1992Fritsch E., Langelier G. (1992) Origine de la couleur des vésuvianites vertes, mauves et bicolores du Québec. The Canadian Gemmologist, Vol. 13, No. 1, pp. 6-13. Fritsch E., Muhlmeister S., Birkner A. (1992) A preliminary spectroscopic study of Biron synthetic pink titanium-beryl. The Australian Gemmologist, Vol. 18, No. 3, pp. 81-82. Fritsch E. (1992) Gemological applications of synthetic diamond and diamond-like carbon products grown using the low-pressure deposition technique. Proceedings of the International Gemological Symposium 1991 - Facing the Future, Ed. A. Keller, GIA, Santa Monica, CA, USA, pp. 44. Chai B.H.T., Fritsch E. (1992) Synthetic blue gehlenite. Proceedings of the International Gemological Symposium 1991 - Facing the Future, Ed. A. Keller, GIA, Santa Monica, CA, USA, pp. 153-154. Chai B.H.T., Fritsch E. (1992) Synthetic "Scalexandrite" and vanadium chrysoberyl. Proceedings of the International Gemological Symposium 1991 - Facing the Future, Ed. A. Keller, GIA, Santa Monica, CA, USA, pp. 154. GIA Research (1992) Extremely rare unmounted circular-cut fancy bluish green diamond. Christie's. Magnificent Jewels. No. 7522. pp. 204. Fritsch E., Scarratt K. (1992) Natural-color nonconductive gray-to-blue diamonds. Gems & Gemology, Vol. 28, No. 1, pp. 35-42. Shigley J.E., Fritsch E., Reinitz I., Moon M. (1992) An update on Sumitomo gem-quality synthetic diamonds. Gems & Gemology, Vol. 28, No. 2, pp. 116-123. Fritsch E., Wu S.-T. T., Moses T., McClure S.F., Moon M. (1992) Identification of bleached and polymer-impregnated jadeite. Gems & Gemology, Vol. 28, No. 3, pp. 176-187. 1991Koivula J.I., Kammerling R.C., Fritsch E. (1991) Gemmological investigation of a synthetic spinel crystal from the Soviet Union. Journal of Gemmology, Vol. 22, No. 5, pp. 300-304. Kammerling R.C., Koivula J.I., Fritsch E. (1991) Characterization of a so-called "Reconstructed Lapis Lazuli". The Australian Gemmologist, Vol. 17, No. 11, pp. 450-453. Fritsch E. (1991) Diamonds colored by hydrogen. Jewelers' Circular Keystone, Vol. 162, No. 6, pp. 66 Kammerling R.C., Koivula J.I., Fritsch E. (1991) Plastic imitation opals purchased in Thailand. The Australian Gemmologist, Vol. 17, No. 12, pp. 498-501. Fritsch E., Scarratt K., Collins A.T. (1991) Optical properties of diamonds with an unusually high hydrogen content. Materials Research Society International Conference Proceedings. Second International Conference on New Diamond Science and Technology, Washington D.C., September 23-27. Editors R. Messier, J.T. Glass, J.E. Butler, R. Roy. Materials Research Society, Pittsburgh, PA, pp. 671-676. Fritsch E., Shigley J.E. (1991) Properties of some natural-color and laboratory-irradiated green to blue diamonds. Materials Research Society International Conference Proceedings. Second International Conference on New Diamond Science and Technology, Washington D.C., September 23-27. Editors R. Messier, J.T. Glass, J.E. Butler, R. Roy. Materials Research Society, Pittsburgh, PA, pp. 677-681 Rossman G.R., Fritsch E., Shigley J.E. (1991) Origin of color in cuprian elbaite tourmalines from Sao Jose de Batalha, Paraiba, Brazil. American Mineralogist, Vol. 76, pp. 1479-1484 Kammerling R.C., Koivula J.I., Kane R.E., Maddison P., Shigley J.E., Fritsch E. (1991) Fracture filling of emeralds: Opticon and traditional « oils ». Gems & Gemology, Vol. 27, No. 2, pp. 70-85. Kammerling R.C., Koivula J.I., Kane R.E., Fritsch E., Muhlmeister S., McClure S.F. (1991) An examination of nontransparent « CZ » from Russia. Gems & Gemology, Vol. 27, No. 4, pp. 240-247. 1990Fritsch E., Rossman G.R. (1990) New technologies of the 1980s: their impact on gemology. Gems & Gemology, Vol. 26, No. 1, pp. 64-75. Kane R.E., Kammerling R.C., Koivula J.I., Shigley J.E., Fritsch E. (1990) The identification of blue diffusion-treated sapphires. Gems & Gemology, Vol. 26, No. 2, pp. 115-133. Fritsch E., Shigley J.E., Rossman G.R., Mercer M.E., Muhlmeister S.M., Moon M. (1990) Gem-quality cuprian elbaite from Sao Jose de Batalha, Paraiba, Brazil. Gems & Gemology, Vol. 26, No. 3, pp. 189-205. Robert D., Fritsch E., Koivula J.I. (1990) « Emeraldolite » : a new synthetic emerald overgrowth on natural beryl. Gems & Gemology, Vol. 26, No. 4, pp. 288-293. Koivula J.I., Kammerling R.C., Fritsch E. (1990) Gemmological description of a glass imitation emerald from Zambia. The South African Gemmologist, Vol.4, No. 2, pp. 7-13. Fritsch E., Shigley J.E. (1990) Green diamonds suddenly not so rare. Jewellery News Asia, No. 70, pp. 110, 114 and 116. Fritsch E., Shigley J., Stockton C., Koivula J. (1990) Criteria to tell natural from treated greens can be wrong. Jewellery News Asia, No. 71, pp. 118, 120, 122, 124. Shigley J.E., Fritsch E. (1990) Color zones can indicate laboratory irradiation. New York Diamonds, No. 11, pp. 74 & 82. Kammerling R.C., Koivula J.I., Fritsch E. (1990) An examination of chrysoprase from Goias, Brazil. The Australian Gemmologist, pp. 313-315. 1989Kammerling R.C., Koivula J.I., Fritsch E. (1989) An unusual assembled "emerald" crystal from Brazil. Canadian Gemmologist, Vol. 10, No. 2, pp. 36-43. Shigley J.E., Fritsch E. (1989) Irradiated diamond detectable by color zoning. (en japonais) Tokyo Diamonds, pp. 100 & 102. Koivula J.I., Kammerling R.C., Fritsch E., Fryer C.W., Hargett D., Kane R.E. (1989) The characteristics and identification of filled diamonds. Gems & Gemology, Vol. 25, No. 2, pp. 68-83. Premier prix, Most valuable article of the year award, Gems & Gemology. Fritsch E., Conner L., Koivula J.I. (1989) A preliminary gemological study of synthetic diamond thin films. Gems & Gemology, Vol. 25, No. 2, pp. 84-90. Fritsch E., Shigley J.E. (1989) Contribution to the identification of treated colored diamonds: diamonds with peculiar color-zoned pavilions. Gems & Gemology, Vol. 25, No. 2, pp. 95-101. Koivula J.I., Fritsch E. (1989) The growth of Brazil-twinned synthetic quartz and the potential for synthetic amethyst twinned on the Brazil law. Gems & Gemology, Vol. 25, No. 3, pp. 159-164. Woodruff R.E., Fritsch E. (1989) Blue pectolite from the Dominican Republic. Gems & Gemology, Vol. 25, No. 4, pp. 216-225. 1988Fritsch E., Rossman G.R. (1988) An Update on Color in Gems. Part 2: Colors involving multiple atoms and color centers. Gems & Gemology, Vol. 24, No. 1, pp. 3-15. Fritsch E., Rossman G.R. (1988) An Update on Colors in Gems. Part 3: Colors caused by band gaps and physical phenomena. Gems & Gemology, Vol. 24, No. 2, pp. 81-102. Fritsch E., Shigley J.E., Stockton C.M., Koivula J.I. (1988) Detection of treatment in two unusual green diamonds. Gems & Gemology, Vol. 24, No. 3, pp. 165-168. Fritsch E., Misiorowski E.B. (1988) Queen conch "Pearls": Rare gems from the Carribean Sea. Sea Frontiers, Vol. 34, No. 5, pp. 286-291. Fritsch E., Koivula J.I. (1988) How to tell natural amethyst. Jewelers' Circular Keystone, October 1988, pp. 244-248. Koivula J.I., Fritsch E., Fryer C. (1988) The gemmological characteristics of Inamori synthetic cat's eye alexandrite chrysoberyl. Journal of Gemmology, Vol. 21, No. 4, pp. 232-236. 1987Fritsch E. (1987) Connaître les macles. Première partie. Monde & Minéraux, Vol. 77, pp. 16-19. Fritsch E. (1987) Connaître les macles. Deuxième partie. Monde & Minéraux, Vol. 78, pp. 44-49. Fritsch E., Koivula J.I. (1987) How to tell if that amethyst is natural. Jewelers’ Circular-Keystone, July 1987, pp. 323-324. Fritsch E. (1987) A red diamond in New York. Christie's Review of the Season 1987, Mark Wrey and Susanna Spicer editors, Phaidon-Christie's, Oxford, pp. 282-283. Shigley J.E., Fritsch E., Stockton C.M., Koivula J.M., Fryer C.W., Kane R.E. (1987) Les diamants synthétiques Sumitomo. Revue de Gemmologie a.f.g., Vol. 92, pp. 10-14. Fritsch, E., Stockton C.M. (1987) Infrared spectroscopy in gem identification. Gems and Gemology, Vol. 23, No. 1, pp. 18-26. Fritsch E., Rossman G.R. (1987) An update on color in gems. Part 1: Introduction and colors caused by dispersed metal ions. Gems and Gemology, Vol. 23, No. 3, pp. 126-139. Deuxième prix, Most valuable article of the year award, Gems & Gemology. Shigley J.E., Fritsch E., Stockton C.M., Koivula J.I., Fryer C.W., Kane R.E., Hargett D.R., Welch C.W. (1987) The gemological properties of the De Beers gem-quality synthetic diamonds. Gems and Gemology, Vol. 23, No.4, pp.187-206. Fritsch E., Babonneau F., Sanchez C., Calas G. (1987) Vanadium incorporation in silica glasses. Journal of Non-Crystalline Solids, Vol. 92, pp. 282-294. Fritsch E., Misiorowski E.B. (1987) The history and gemology of the Queen Conch « pearls ». Gems and Gemology, Vol. 23, No. 4, pp. 208-221. 1986Shigley J.E., Fritsch E., Stockton C.M., Koivula J.I., Fryer C.W., Kane R.E. (1986) The gemological properties of the Sumitomo gem-quality synthetic yellow diamonds. Gems and Gemology, Vol. 22, No. 4, pp. 192-208. 1985Fritsch E. (1985) La couleur des minéraux et des gemmes. Première partie: Des tribulations d'un électron à l'intérieur d'un atome isolé. Monde & Minéraux, Vol. 67, pp. 20-25. Fritsch E. (1985) La couleur des minéraux et des gemmes, deuxième partie. Monde & Minéraux, Vol. 69, pp. 12-17. Fritsch E. (1985) . Monde & Minéraux, Vol. 70, pp. 12-22. Fritsch E., Calas G. (1985) Thermal darkening of silica glass : a spectroscopic study. Journal of Non-Crystalline Solids, Vol. 72, pp. 175-179. Bianconi A., Fritsch E., Calas G., Petiau J. (1985) X-ray absorption near-edge structure of 3d transition elements in tetrahedral coordination : the effect of bond length variation. Physical Review B., Vol. 32-6, pp. 4292-4296. Marcelli A., Davoli I., Bianconi A., Garcia J., Gargano A., Natoli C.R., Benfatto M., Chiarada P., Fanfoni M., Fritsch E., Calas G., Petiau J. (1985) Local structure in SiO2 glasses by oxygen K-edge XANES. Journal de Physique Colloques, C8, Vol. 46, pp. 107-112. 1984Fritsch E. (1984) Une exception: les macles. Monde & Minéraux, Vol. 61, pp. 4-7. |
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