 | | 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,...aquamarine, 1.12 ct Imperial topaz and 4.84 ct golden beryl. Courtesy of John Dyer Gems; composite photo by...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 |  | | Journal (issue) | | epidote deposits of the Capelinha Region, Minas Gerais, Brazil ......................................315...epidote on matrix, 4.4 cm, from Capelinha, Minas Gerais, Brazil. Gail and Jim Spann collection; Tom Spann...w. FineMineral.com Tourmaline Cruzeiro Mine, Brazil. 19.5 cm Fine Minerals International proudly invites...EPIDOTE DEPOSITS OF THE CAPELINHA REGION, MINAS GERAIS, BRAZIL Andrea Bartorelli1 Carlos Cornejo2 Mario...mid-1960s, the Capelinha region in the State of Minas Gerais, Brazil, has become world-famous for producing beautiful |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...crystals and the remarkable mineral treasures of Brazil, as well as the incredible adventures and difficulties...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL Cyan Magenta Yellow Black 1 Delev Ilia Deleff...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL SOFIA–MOSCOW 2004 3 Cyan Magenta Yellow Black...MINERAL TREASURES OF BRAZIL 76 85 AN OUTLINE OF THE MINERAL RESOURCES OF BRAZIL ORIGIN OF GIANT CRYSTALS |  | | Journal (article/letter/editorial) | | muscovite crystals, to 3 cm, on albite, Galileia, Brazil. T Taxonomy of the Mica Group The mica minerals...about 3 cm; Riacho Genipapo, near Aracuaí, Minas Gerais, Brazil. All photos by the author of specimens in...forming a 10-cm rosette, Jose Pinto mine, Minas Gerais, Brazil. Table 3. Interlayer-deficient micas. Dioctahedral...quartz at Riacho Genipapo, near Aracuaí, Minas Gerais, Brazil (Cassedanne and Cassedanne 1981). A spectacular...lavender crystals are found at Aracuaí, Minas Gerais, Brazil. Distinctive spherical and stalactitic masses |  | | Journal (issue) | | Emerald Business in Colombia Focus on Brazil 36 30 Booming Brazil – A Rising Star in the Jewelry Industry...Gemstones 52 Interesting New Gemological Finds in Brazil Mining 62 Andesine in Tibet – A Second Field...production of 12.8 million carats of emerald and beryl is equivalent to three-quarters of production in...Oliveira (2005) describes cases in Campos Verdes, Brazil where inexpensive projects have resulted in concrete...Mining and Local Development: Three Case Studies in Brazil, 31pp. • Sarassin, B., 2006. The mining industry |  | | 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...most famous among collectors for tourmaline and beryl in the 1960s, thanks to the discovery of extraordinary |  | | Journal (issue) | | 32 Purple to Reddish Purple Chrysoberyl from Brazil 42 Identification Characteristics of Natural...temperatures, a bicoloured purple and blue ‘Maxixe’ beryl, an aquamarine that was fracture-filled with epoxy...Cat’s-eye Apatite from Brazil Intense blue apatite is known from Minas Gerais, Brazil, and cat’s-eye stones...David Epstein (Precious Resources Ltda., Teófilo Otoni, Brazil). He reported that the material was found...These cat’s-eye apatites (2.45 and 3.80 ct) from Brazil are colourless, which is highly unusual for this |  | | Journal (issue) | | Business Review 2019 Gem Notes Albite from Brazil | Dark Blue Beryl from Pakistan | Emerald from Nunavut,...from India | Quartz from Brazil with Biotite Inclusions | Quartz from Brazil with Dendritic Inclusions...with Unusual Inclusion Scenery | Scapolite from Brazil | Spessartine Reportedly from Ethiopia | Diamond... Gem Notes COLOURED STONES Albite from Minas Gerais, Brazil During the February 2019 Tucson gem shows...albite from Brazil. He obtained 50 kg of rough material in August 2018 while visiting Brazil, and was told |  | | Journal (issue) | | demantoid, (12) 1.05 ct emerald, (13) 1.99 ct red beryl, (14) 0.72 ct ruby, (15) 1.15 ct purplepink sapphire...Namibia, as well as Madagascar), South America (Brazil and Colombia), central and southern Asia (Sri Lanka...Pakistan; and pink to red tourmalines from Nigeria and Brazil. Diamond was mined in northern Canada for the first...feldspar, iolite, lapis lazuli, maw sit sit, red beryl, rhodochrosite, rhodonite, scapolite, sphene, spodumene...by Robert Weldon. 294 Localities of the 1990s BERYL Emerald. Colombia still reigned throughout the 1990s |  | | Journal (issue) | | Amazonite in Quartz from Bahia, Brazil | Blue Apatite in Jasper from Brazil | Aquamarine Crystal with ‘Enhydro’...‘Enhydro’ Inclusion from Brazil | Catapleiite from Mont Saint-Hilaire, Québec, Canada | Chrysocolla Chalcedony...Quartz from Bahia, Brazil Gem-quality amazonite feldspar is well known from Brazil, particularly from...Leonardo Silva Souto (Gems in Gems, Teófilo Otoni, Minas Gerais, Brazil) had some new production of amazonite...Internacional de Pedras Preciosas (FIPP) show in Teófilo Otoni, and the initial production consisted of about |  | | Journal (issue) | | Afghanistan, Pakistan, and Myanmar • Recent gem beryl production in Finland • Hessonite from Afghanistan...• Rhodonite of facet and cabochon quality from Brazil • Spessartine and almandine-spessartine from Afghanistan...reddish brown hematite flakes, growth zoning, and Brazil-law twinning, all of which provide visual clues...effect. Like amethyst from other localities (e.g., Brazil), some material from Four Peaks is heated to lighten...In transmitted light between crossed polarizers, Brazil-law twinning was obvious in all the samples studied |  | | Journal (issue) | | Carved Brazilian bicolored beryl and Nigerian tourmaline • New deep pink Cs-“beryl” from Madagascar • New...confetti-like fluid films on basal planes in a green beryl from Madagascar (magnified 66×). On the bottom,...by Leon Agee. The patterned colors are caused by Brazil-law twinning, while light reflecting from rutile...light is used. The quartz crystal in this golden beryl (heliodor) shows low relief in transmitted light...interference colors that make it clearly visible in the beryl host. Magnified 10×. PHOTOMICROGRAPHY FOR GEMOLOGISTS |  | | Journal (issue) | | AND MARKETS Figure 9. Near Nova Era in Minas Gerais, Brazil, the Belmont mine operates using sophisticated...other mines in the area slowed (Weldon, 2006). Brazil witnessed a sustained slump in overall gemstone...in places like the United Arab Emirates, Russia, Brazil, India, and China—locations that would not have...discovered in Paraíba and Rio Grande do Norte states in Brazil in 1989 (Fritsch et al., 1990) and became known...plummeted, mining operations in key centers such as Brazil and Zambia curtailed or ceased production, though |  | | Journal (issue) | | SPRING 2006 PAGES 1–94 “Paraíba” Tourmaline from Brazil, Nigeria, and Mozambique Lead Glass–Filled Rubies... “Paraíba”-type Copper-bearing Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting...Myanmar • Gem-quality massive pink muscovite from Brazil • Pyrope-spessartine from Tanzania • Transparent...copper-bearing “electric” blue elbaite from Paraíba State, Brazil, has been one of the most sought-after gem varieties...Cu-bearing elbaites have been found elsewhere in Brazil, as well as in Nigeria and Mozambique. The lead |  | | Journal (issue) | | International 2004 Tucson report • Yellow cat’s-eye beryl from Brazil • Update on demantoid and cat’s-eye demantoid...J. Dunn and W. Wight, “Green gem herderite from Brazil,” Journal of Gemmology, Vol. 15, No. 1, 1976, pp...the Gemological Center in Belo Horizonte, Minas Gerais, Brazil. Given the rarity of this material, these...45 × 22.56 × 13.52 mm), reportedly from Minas Gerais, Brazil, is one of six large herderites examined...hydroxyl-herderite in Brazil are the Virgem da Lapa and Golconda mines in Minas Gerais (P. J. Dunn et al |  | | Journal (issue) | | in the beryl structural channels. G em-quality aquamarine has been produced mainly from Brazil and Africa...used to investigate H2O and CO2 molecules in the beryl structural channels, as these can show differences...(1995). To study the characteristics of H2O in the beryl channels, we recorded IR spectra from portions of...Carbon dioxide and type I water are present in the beryl-structure channels. sions were seen less frequently...related to the vibration of CO2 molecules in the beryl structural channels (Charoy et al., 1996). It was |  | | Journal (issue) | | growth features • Fuchsite-corundum rock from Bahia, Brazil • Pen shell pearls— nacreous and non-nacreous •...buying offices in most African producing nations and Brazil to buy rough on the open market. With one exception...from Broken Hill. Faceted rhodonite from Minas Gerais, Brazil, was recently found to contain curved needles...International: Rhodonite of facet and cabochon quality from Brazil. Gems & Gemology, Vol. 40, No. 3, pp. 260–261....to create gem mosaics. During a recent trip to Brazil, several examples of this new artwork, referred |  | | Journal (issue) | | the University of Michigan, Ann Arbor, and Carmen Beryl Williams Liddicoat. Both his grandfathers were miners...In the center photo, a large red beryl crystal and faceted red beryl both appear grayish through the Hanneman...liddicoatite from other world localities (i.e., Brazil, Canada, “Congo,” Czech Republic, Mozambique, Nigeria...spodumene (kunzite), native bismuth, spessartine, beryl (morganite), hambergite, danburite, phenakite, and...Koivula and Kammerling [1990]), reportedly from Minas Gerais, TABLE 1. Properties of liddicoatite-elbaite |  | | Journal (issue) | | of this new cesium-rich member of the beryl group. 302 Red Beryl from Utah: A Review and Update James...world’s only known occurrence of gem-quality red beryl. pg. 299 REGULAR FEATURES _____________________...optical centers • Gem-quality afghanite • Blue beryl discovery in Canada • Gem-quality corundum from...North American West Coast • “Platinum quartz” from Brazil • Some rare faceted gem materials • Large scapolite...THE COVER Within the beryl group, two of the rarest gem materials are red beryl and the new mineral pezzottaite |  | | Journal (issue) | | Gemstone Knowledge Hub 468 Gem Notes Amethyst from Brazil|Beryllonite from Pakistan|Apache Blue Stone from...Tanzania|Alluvial diamond mining in South Africa| Quartz from Brazil with hematite/goethite, pyrite and rhodochrosite...gem-producing nations, including Afghanistan, Australia, Brazil, Madagascar, Nigeria, Sri Lanka and Tanzania. Visit... 467 Gem Notes COLOURED STONES Amethyst from Brazil with Interesting Inclusion Patterns During the...FIPP 2016 International Gemstone Show in Teófilo Otoni, Brazil, that took place in August, a new find of |  | | Journal (issue) | | “Alphabet” agates from Indonesia • Cat’s-eye beryl from Brazil • Magnetic corundum • Large pink fluorite...gets its highly saturated color from vanadium. beryl, with properties very similar to those of the natural...These cat’s-eye beryl cabochons (24.78 and 23.67 ct) were purchased as quartz in Brazil. Photo by Jaroslav...Jaroslav Hyrsl. Unusual cat’s-eye beryl from Brazil. Cat’s-eye beryl is not uncommon, but two cabochons...contributor in Brazil in 2001 proved very unusual. Although sold as quartz, their identity as beryl was established |  | | Journal (issue) | | diamonds by volume. 42 Hydrothermal Synthetic Red Beryl from the Institute of Crystallography, Moscow James...Ludmila N. Demianets Grown to mimic the beautiful red beryl from Utah, this synthetic can be identified by its...Unusual andradite garnet • Synthetic apatite • Beryl-and-glass triplet imitating emerald • Diamond with...Laghman, Afghanistan • Emeralds from Piteiras, Brazil • Educational iolite • “Hte Long Sein” jadeite...GEMOLOGY SPRING 2001 41 HYDROTHERMAL SYNTHETIC RED BERYL FROM THE INSTITUTE OF CRYSTALLOGRAPHY, MOSCOW By |  | | Journal (issue) | | mine, Bolivia • Andradite from China • Barite from Brazil • Gem hanksite • Lepidolite beads • “Soufflé” freshwater...freshwater cultured pearls • “Churrasco quartz” from Brazil • Cat’s-eye rhodonite • Large H-rich diamond •...Online: Spring 2006 “Paraíba”-type Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting...Diamonds Aquamarine, Maxixe-Type Beryl, and Hydrothermal Synthetic Blue Beryl A New Type of Synthetic Fire...Iron Colorants in Gem Tourmalines Andalusite from Brazil Peridot from Sardinia, Italy Fall 2007 The Transformation |  | | Journal (issue) | | 2.Universidade Federal Rural do Rio de Janeiro, Brazil (UFRRJ) - fermamll@ufrrj.br 3.IRD caixa postal...REE- carbonate phosphates, niobium, carbonatite, Brazil. 1. Introduction The alkaline-carbonatite complex...southeast of the state of Goiás and westwards of Minas Gerais, Brazil. It outcrops at about 20 km NE of the city...Field Guide Book, 5th Int. Kimberlite Conf., Araxá, Brazil ; CPRM, Brasilia, Sp. Publ., 1991, pp. 25-30. Elliott...Morbidelli L., 1990. Carbonatite complexes from Brazil: a review. J. South Amer. Earth Sc., 3-1 (1990) |  | | Journal (issue) | | quantitative chemical analyses to distinguish samples from Brazil, Nigeria, and Mozambique. 660 Geographic Origin...accounts for about 70% of worldwide production (Brazil, Zambia, Russia, and others). It is characterized...such as at the Santa Terezinha de Goiás deposit in Brazil. The subtype Type IIB is showcased by the Colombian...II: EMERALD Emerald is the green gem variety of beryl (Be2+3Al3+2Si4+6O2–18) (figure 9). The color of...and/or V replacing Al in the crystal structure. Beryl has a hardness of 7.5–8 on the Mohs scale. Economic |
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Teófilo Otoni, Minas Gerais, Brazil