Publications 2014

Stéphant N., Rondeau B., Gauthier J.-P., Cody J.A., Fritsch E. (2014) Investigation of hidden periodic structures on SEM images of opal-like materials using FFT and IFFT. Scanning, vol.35, n°5, pp. 487-499.

Feneyrol J., Giuliani G., Ohnenstetter D., Rondeau B., Fritsch E., Fallick A.E., Ichang'I D., Omito E., Rakotondrazafy M., Ranatsenho M., Lallier F. (2014) New typology and origin of tsavorite based on trace-element chemistry. European Journal of Mineralogy, vol. 26, pp. 293-308. doi:10.1127/0935-1221/2014/0026-2367

Ferraris C. Parodi G.C., Pont S., Rondeau B., Lorand J.-P. (2014) Trinepheline and fabriesite: two new mineral species from the jadeite deposit of Tawmaw (Myanmar). European Journal of Mineralogy, vol. 26, pp. 257-265.

Feneyrol J., Giuliani G., Ohnenstetter D., Rondeau B., Fritsch E., Fallick A.E., Ichang'i D., Omito E. (2014) New typology and origin of tsavorite. InColor, summer 2014, n° 26, pp. 28-34.

Fritsch E., Rondeau B. (2014) Pierres précieuses : teintes changeantes et contrefaçons courantes. École Thématique Interdisciplinaire de printemps CNRS Couleur et Illusion. Roussillon en Provence. Livre de cours pp. 79-88.

Publications 2013

Pradat T., Rondeau B., Fritsch E. (2013) Gem News International: Unusual facetted massive fuchsite. Gems & Gemology, vol. 49, n°4, pp. 183-184.

Fritsch E., Raoul J., Rondeau B., Segura O. (2013) Gem News International: Demantoid garnet fossil pseudomorphs. Gems & Gemology, vol. 44, n°4, pp. 257-258.

Hainschwang T., Fritsch E., Notari F., Rondeau B., Katrusha A. (2013) The origin of color in natural C center bearing diamonds. Diamond & Related Materials, vol. 39, pp. 27-40.

Rondeau B., Gauthier J.-P., Mazzero F., Fritsch E., Bodeur Y., Chauviré B. (2013) On the origin of digit patterns in opal. Gems & Gemology, vol. 49, n°4, pp.138-146.

Nguyen-Bui H.A., Fritsch E., Rondeau B. (2013) Les origines géologique et géographique des gemmes.Géochronique, n° 128, pp. 37-43.

Rondeau B., Chauviré B., Mazzero F., Ayalew D., Fritsch E. (2013) Géologie et gemmologie de l'opale. Géochronique, n° 128, pp. 31-37.

Rondeau B., Fritsch E. (2013) Gemmes et gemmologie. Géochronique, n° 128, pp. 10-16.

Gauthier J.-P., Mazzero F., Rondeau B., Fritsch E. (2013) De l'originalité des opales éthiopiennes. Revue de Gemmologie a.f.g., vol. 184, pp.11-16.

Publications 2012

Fritsch E., Rondeau B. (2012) Les gemmes de l'Etat d'Orissa, au nord-est de l'Inde. Dans : Les gemmes du Gondwana. Les Cahiers du Règne Minéral, n°2, pp. 118-120.

Rondeau B., Fritsch E. (2012) Les gemmes del'Afrique de l'Est : ce qui est Néoprotérozoïque... ou qui ne l'est pas ! Dans : Les gemmes du Gondwana. Les Cahiers du Règne Minéral, n°2, pp. 128-142.

Rondeau B., Gauthier J.-P., Fritsch E. (2012) Gem News International: Naturally healed fractures in Ethiopian opals. Gems & Gemology, vol. 48, n°4, pp. 306-307.

Hainschwang T., Fritsch E., Massi L., Rondeau B., Notari F. (2012) The C center isolated nitrogen-related infrared absorption at 2688 cm-1: perfect harmony in diamond. Diamond & Related Materials, vol. 79, n°5, pp. 737-743.

Hainschwang T., Fritsch E., Rondeau B., Notari F. (2012) A new defect center in type Ib diamond inducing one phonon infrared absorption: the Y center. Diamond & Related Materials, vol. 21, pp.120-126.

Pradat T., Rondeau B., Gauthier J.-P. (2012) Gem News International: Geikielite from Sri Lanka with fake star effect. Gems & Gemology, vol. 48, n°1, p. 69.

Rondeau B., Cenki-Tok B., Fritsch E., Mazzero F., Gauthier J.-P., Bodeur Y., Bekele E., Gaillou E., (2012) Geochemical and petrological characterization of gem opals from Wegel Tena, Wollo, Ethiopia: opal formation in an Oligocene soil. Geochemistry : Exploration, Environment, Analysis , vol.12, pp.93-104.

Nguyen Bui H.A., Fritsch E., Rondeau B. (2012) Geographical origin: branding or science?In Color, Spring 2012, n°2, pp. 30-39.

Gauthier J.-P., Rondeau B., Pradat T. (2012) Zircon et geikielite artificiellement étoilés du Sri Lanka. Revue de gemmologie a.f.g., vol. 180, pp. 5-11.

Fritsch E., Rondeau B., Hainschwang T., Karampelas S., (2012) Chapter 13: Raman spectroscopy applied to gemology. In EMU Notes in Mineralogy, Vol. 12, pp. 453–488.

Segura O., Lulzac Y., Fritsch E. (2012) Gem News International: “True” red pulled synthetic spinel from RussiaGems & Gemology, Vol. , N° 3, pp. 159-160.

Delaunay A., Fritsch E. (2012) Les observations au DiamondViewTM et leur intérêt pour la classification des diamants. Revue de gemmologie a.f.g., No. 180, pp. 20-24

Hainschwang T., Fritsch E., Massi L., Rondeau B., Notari F. (2012) The C center isolated nitrogen-related infrared absorption at 2688 cm-1: perfect harmony in diamond. Diamond & Related Materials, vol. 79, n°5, pp. 737-743.

Publications 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. 333-334.

Pradat T., Rondeau B., Fritsch E. (2011) Gem News International: Chatoyant quartz with cinnabar inclusions. Gems & Gemology, vol. 47, n°4, pp. 322-323.

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.

Rondeau B., Fritsch E., Mazzero F., Gauthier J.-P. (2011) Opal: the craze for stability. In Color, Winter 2011, n°4, pp.42-45.

 

Rondeau B., Cenki-Tok B., Fritsch E., Mazzero F., Gauthier J.-P., Bodeur Y., Bekele E., Gaillou E., (2012) Geochemical and petrological characterization of gem opals from Wegel Tena, Wollo, Ethiopia: opal formation in an Oligocene soil. Geochemistry, Exploration, Environment, Analysis , vol.12, pp.93-104.

Publications 2010

Mazzero 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 RomaniaGems & 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.

Publications 2009

Fritsch 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.

Publications 2008

Gauthier 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.

Publications 2007

Karampelas 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.

Publications 2006

Singbamroong 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).

Publications 2005

Hyrsl 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.

Publications 2004

Fritsch 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.

Publications 2003

Fritsch 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.

Publications 2002

Ostroumov 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.

Publications 2001

Lasnier 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, The 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.

Publications 2000

Chalain 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.

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