 | | Journal (issue) | | SEPTEMBER–OCTOBER 2019 Articles The Golconda District, Minas Gerais, Brazil ..........................................TOURMALINE, 11.9 cm, from the Golconda I mine, Minas Gerais, Brazil Brice Gobin (Mineral Art) and Emanuele Marini...China, South Africa, Namibia, Chile, Peru, Bolivia, Brazil and Mexico. His first exchange of specimens with...September–October, 2019 The Golconda District Minas Gerais, Brazil Carlos Cornejo1 Andrea Bartorelli2 Wendell...important specimen-producing districts in all of Brazil. INTRODUCTION The Golconda Pegmatite Field is a |  | | Journal (issue) | | Articles 708 Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status By Aurélien...Collection V. L. Villani photo p. 758 Cover Photo: Brazil is the source of a variety of coloured stones,...Junior (BC Gemas do Brasil, Governador Valadares, Brazil), and heating to 500°C in air was successful in...it is likely to have been Rio Grande do Sul in Brazil, well known for its amethyst, agate and jasper...Trade in Brazil: A Brief History and Current Status Aurélien Reys Coloured stones from Brazil have been |  | | Journal (issue) | | by Leon Agee. The patterned colors are caused by Brazil-law twinning, while light reflecting from rutile...Luciana Barbosa, Gemological Center, Belo Horizonte, Brazil; Edward Boehm, Joeb Enterprises, Solana Beach,...including amethyst, andalusite, danburite, garnet, goshenite, scapolite, topaz, tourmaline, and zircon. It...the East Coast lab. Reported to be from a mine in Brazil, it was submitted for identification of its transparent...known to originate from the Brazilian state of Minas Gerais. The same client also submitted a transparent |  | | Journal (issue) | | mining in Sri Lanka • Green cat’s-eye spodumene from Brazil • Color-zoned topaz • Variscite from Peru • Corundum...environments (figure 1). Some contemporary sources are Brazil, Uruguay, Zambia, Namibia, Mexico, Russia, Arizona...Origin Bolivia (Anahí) Bolivia (Anahí) Brazil (Marabá) Brazil (Pau d’Arco) France (St. Raphael) Japan...al., 2005). Some natural material from (Marabá) Brazil shows total absorption in the ~3600 to 3000 cm–1...Kitawaki H. (2002) Natural amethyst from Caxarai mine, Brazil, with a spectrum containing an absorption peak |  | | Journal (issue) | | and a 3.20 ct Paraíba tourmaline trillion from Brazil. The rings and loose stones are courtesy of Omi...California (Fisher, 2011) in the U.S. as well as Brazil (Proctor, 1985a,b; Koivula and Kammerling, 1989)... Pink elbaite with gray fibers; Cruzeiro mine, Brazil (see Dutrow and Henry, 2000) BD-S4 Black schorl...crystals; Brumado, Brazil BD-S6 Cluster of small light green uvite crystals; Brumado, Brazil a GIA samples...elbaite (BD-S3) from the Cruzeiro mine in Minas Gerais, Brazil. D: Schorl (BD-S4) from Larsemann Hills |
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Araçuaí, Minas Gerais, Brazil