 | | Journal (issue) | | figures on a first order prism face of a green beryl crystal from the Soviet Union. The c-axis runs in...Interference Contrast. 80x. (See 'Etch figures on beryl', p. 142) Photograph by John I. Koivula. ISSN:...synthetically grown beryl During the International Gemmological Conference held in Brazil in September/October...the author was given a group of four synthetic beryl crystals. They were given via Dr Miyata of the Institute...reddish beryl, sky blue beryl, pink beryl, violet beryl, yellowish-green beryl, colourless beryl and watermelon |  | | Journal (issue) | | Federal University of Ouro Preto, Minas Gerais, Brazil **University of Mainz, FRG 1. Introduction The...been the most important emerald mining region in Brazil until the discovery of the Santa Terezinha occurrence...estimates on reserves of about 2.000 tons of green beryl, including emerald. Of these, 990 tons came from...molybdenite, lepidocrocite (Figure 14), goethite, beryl (emerald), tremolite/ actinolite (Figure 15), apatite...inclusions are fragments or protogenetic chips of beryl (emerald) that have been described also by Gübelin |  | Franz, Gerhard, Vyshnevskyi, Oleksii, Taran, Michail, Khomenko, Vladimir, Wiedenbeck, Michael, Schiperski, Ferry, Nissen, Jörg (2020) A new emerald occurrence from Kruta Balka, Western Peri-Azovian region, Ukraine: Implications for understanding the crystal chemistry of emerald. American Mineralogist, 105 (2) 162-181 doi:10.2138/am-2020-7010 | Journal (article/letter/editorial) | | investigated emerald, the bright-green gem variety of beryl, from a new locality at Kruta Balka, Ukraine, and...called femag-beryl with Na occupying a vacancy position (o) in the structural channels of beryl. Based on...apatite) point to a pegmatitic origin. Keywords: Beryl, substitution mechanisms, ion microprobe analysis...and Boron: Quintessentially crustal Introduction Beryl, ideally Al2Be3[Si6O18], is the most abundant Be-bearing...Be-bearing mineral; solid solutions between beryl and other components have been the subject of several |  | | Journal (issue) | | Pearl Testing 36 Emeralds from South America – Brazil and Colombia 48 Clinohumite – The Mountain Fire...rise of new economies such as China, India, and Brazil. The challenges have been numerous as these new...every ICA member, I would like to thank the IBGM in Brazil along with every company, individual, and government... G E M O LO G Y Emeralds from South America – Brazil and Colombia By Dr. Dietmar Schwarz, research manager...terms of size and variety of gemstone deposits, Brazil can be considered as a large gemological province |  | | Journal (issue) | | Minas Gerais, Brazil **University of Mainz, West Germany ***CPRM, Salvador, Bahia, Brazil 1. Introduction...is currently being mined belongs to the farm 'Fazenda Piabas' and was was occupied by garimpeiros (freelance...OOO I Km 30°S 50 0 W Bahia Bahia BA-S BA-5 Fazenda do Pombo BA-6 A~ude Açude do Sossego BA-7 Brumado...BA-10 Socoto Socotö 1. The emerald occurrences in Brazil. Fig. 1. Ceara Cearâ CE-ll Tami CE-llTauâ Minas...(Itabira) MG-2 Santana dos Ferros Goias Goids GO-3 Fazenda das Lajes (Itaberai) (Itaberaï) GO-4 Santa Terezinha |  | | Journal (issue) | | INSTITUTE OF AMERICA Emeralds from Northeastern Brazil Diamantine: Coated Cubic Zirconia Precision Measurement...pg. 3 Emeralds from the Fazenda Bonfim Region, Rio Grande do Norte, Brazil J. C. (Hanco) Zwaan, Dorrit...Polished emeralds from this deposit in northeastern Brazil, discovered in 2006, typically display a saturated...from Pakistan • Cat’s-eye emerald from Belmont, Brazil • Meteorite watches • Purple common opal from Mexico...of the publisher. About the Cover For decades, Brazil has been one of the world’s major sources of fine |
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