 | | Journal (article/letter/editorial) | | Aegirine, Arkansas, 181 Aguilarite, 27 Albite, Minas Gerais, 313 Alforsite, 367 Allanite-(Ce), Colorado...Sentinel Quarry) near Governador Valadares, Minas Gerais, Brazil, C. P. Barbosa, R. V. Gaines, 310-13 Amethyst...Sentinel Quarry) near Governador Valadares, Minas Gerais, Brazil, 310-13 Barite: Colorado, 106; Kentucky...Calcite: Colorado, 302, 332; Kentucky, 258, 327; Minas Gerais, 313; Pennsylvania, 260-70; Wyoming, 167 California:...Chalcopyrite: Colorado, 106; Kentucky, 258, 327; Minas Gerais, 313 Chestermanite, 367 Chips from the Quarry |  | | Journal (issue) | | County, Virginia, Virginia, Minas Minas Gerais, Gerais, Brazil, Brazil, Madagascar, Madagascar, Sri...1.802(3) Taita Hills, Kenya 2 1.795-1.809 Minas Gerais, Brazil3 1.803-1.805 4 Composition Garnets...Brazil:chemical chemicalcharacter characterand and Brazil: thermal behaviour behaviour thermal 1 1 2 2 3...Ouro Preto, MG, Brazil Universidade Federal dede Ouro Preto, 35400, Ouro Preto, MG, Brazil ABSTRACT: Imperial...town Ouro Preto, Minas Gerais, Brazil. town of of Ouro Preto, Minas Gerais, Brazil. Thetwo twomost mostimportant |  | | Journal (issue) | | DRC|Yellow tourmaline from Mavuco, Mozambique|Tremolite from Tanzania|Tsavorite from Ethiopia|Black star...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...http://dx.doi.org/10.5741/GEMS.44.1.4. More Tremolite from Tanzania A recent report in The Journal (Zwaan |  | | Journal (issue) | | 32 Purple to Reddish Purple Chrysoberyl from Brazil 42 Identification Characteristics of Natural...Cat’s-eye Apatite from Brazil Intense blue apatite is known from Minas Gerais, Brazil, and cat’s-eye stones...Epstein (Precious Resources Ltda., Teófilo Otoni, Brazil). He reported that the material was found in January...These cat’s-eye apatites (2.45 and 3.80 ct) from Brazil are colourless, which is highly unusual for this...the origin of the unusual rough material within Brazil is unknown. Brendan M. Laurs Reference O’Donoghue |  | | Journal (issue) | | the CapelinhaMalacacheta Area (State of Minas Gerais, Brazil)..........................................Selection of Superb Gem Minerals recently acquired in Brazil. Also the Finest Dark Blue-Green Amazonite Groups...07003 223 MINERAL COLLEC from the Capelinha-Malacacheta / by Jacques The Rio Doce Valley and the Governador...another unpaved road passes through Pote and Malacacheta (91 km) be fore reaching Capelinha in 5 hours...to the NNW of Capelinha. Access is by way of the Minas Novas road for 7 km, then by the Sac) Caetano 224 |  | | Journal (issue) | | from Brazil shows chatoyancy caused by flat hollow channels. Four-rayed star aquamarine from Brazil has...the c-axis. A tourmaline-quartz combination from Brazil has an iridescent chatoyancy Grey orthoclase moonstone...cat's-eye from Brazil A very unusual example of a cat's-eye was purchased in Brazil by the author in...measuring Figure 1: Chatoyant pale blue topaz from Brazil weighing 152.15 ct. Photo by J. Hyrsl. 32.94 x...described two topaz cat'seyes, one blue of 7.98 ct from Brazil and another colourless of 12.20 ct from Sri Lanka |  | | Journal (issue) | | M a x i x e Beryl" from the Maxixe Mine (Minas Gérais, Brazil). This particular specimen was donated to...Beryl mine also told me that no one (presumably in Brazil) knew the whereabouts of the Maxixe Mine. Following...blue beryl was found in the Maxixe mine in Minas Gerais, Brazil, which h a d the following unusual properties:...rough, from an unspecified locality said to be in Brazil ; a n d three dark green stones a n d some dark...inclusions of a lead-antimony mineral in quartz from Brazil.) Z. Dt. Gemmol. Ges., 1973, 22, 2, 62-64. This |  | | Journal (issue) | | APRIL 1993 Cover Picture The Hematita mine in Minas Gérais in 1987 - probably the richest alexandrite...deposits of alexandrite, cat's-eye and chrysoberyl in Brazil' pp. 333-54) ISSN: 0022-1252 F.G.A. your key...deposits of alexandrite, cat's-eye and chrysoberyl in Brazil JacquesCassedanne, Cassedanne, D.Sc.,* Maurice...Fundiio, Fundão, 21,910, Rio de Janeiro, Janeiro, Brazil *Institute of Geosciences UFRJ-CNPq, Cidade Universitaria...Ipanema, 22,410, 22,410, Rio de Janeiro, Janeiro, Brazil **Maurice Roditi Jewellers, distinguished: Abstract |  | | Journal (issue) | | mine, Minas Gérais, Brazil. See 'The location, geology and mineralogy of gem tourmalines in Brazil' on...location, geology and mineralogy of gem tourmalines in Brazil Jacques P. Cassedanne, Dr. Sc. *, and Maurice Roditi...tourmaline is the 'Eastern pegmatitic province' of Minas Gerais. One general and three detailed maps of specific...Tourmaline, pegmatite, eluvial deposits, gem mining, Brazil © Gemmological Association and Gem Testing Laboratory...the most remarkable coloured gemstones mined in Brazil where, erroneously, for a long time it was marketed |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais. Collection of Alvaro Lucio. Photograph taken...Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo, Andrea...3. Minerals - Brazil 4. Minerals- Classification 5. Mineralogy 6. Mineralogy - Brazil - History 7. Precious...Precious stones - Brazil I. Bartorelli, Andrea. II. Title. 09-10025 Cover photograph: Crystal of brazilianite |  | | Journal (issue) | | Ceylon. (3) Euclase crystal, 1.8 cm, from Minas Gerais, Brazil. (4) Humite, 2.3 cm, from Mount Somma, Italy...Italy. (5) Palladium, 2.1 cm, from Brazil. (6) Mellite, 2.5 cm, from Thuringia, Germany (?). (7) Aragonite...probably from the Jequitinhonha River area, Minas Gerais, Brazil. 4 Refined Elegance, a Supplement to The...Topaz, 2 cm, from Minas Gerais, Brazil. (10) Chrysoberyl, 2.4 cm, from Minas Gerais, Brazil. (11) Euclase...Euclase, 2.1 cm, from Minas Gerais, Brazil. (12) Olivine, 2.7 cm, from St. John’s Island, Egypt. given the |  | | Book | | crandallite from the Alto Benedeto pegmatite, Parai'ba, Brazil (by J.P. Cassedanne & L. Barreto) 22: 183-185 ALTO...Burian goyazite from [Alto Bernardino, Paraiba,] Brazil (by J. S. White, Jr.) 12:379 ALUMOHYDROCALCITE...and muscovite from the Ze Pinto prospect, Minas Gerais, Brazil 21:405-408 --with J.P. Cassedanne: Crystallized...Pitora, Minas Gerais, Brazil 21:409-412 --with J. P. Cassedanne: The Jaguara~u pegmatite, Minas Gerais, Brazil...and platinum from C6rrego Born Sucesso, Minas Gerais, Brazil 23:471-474 AMARGOSA DESERT Hydroboracite |  | | Journal (issue) | | Santa Maria mine, Brazil; (2) 20.10-ct peridot, Burma; (3) 21.09-ct kunzite, Brazil; (4) 8.14-ct grossular... California; (6) 15.18-ct tourmaline, Paraiba, Brazil; (7) 10.42-ct tanzanite, Tanzania; (8) 6.09-ct...38-ct ruby, Burma; (17) 3.08ct tourmaline, Paraiba, Brazil; (18) 1.85-ct fancy purple-pink diamond, Argyle...number of new localities. Fine alexandrites from Brazil, sapphires from Southeast Asia and Australia, emeralds...pegmatite gemstones (tourmaline, aquamarine, etc.) from Brazil, Pakistan, Afghanistan, and several countries in |  | | Journal (issue) | | later shifted his focus to Mexico, and traveled to Brazil, irnporting !arge Supplement to The Mineralogical...Brumado mine, Brumado, Serra das Eguas, Bahia, Brazil. Don and Laura Aaron photo. 12 Supplement to...Spodumene, 9.5 cm, from Resplendor, Doce Valley, Minas Gerais, Brazil. Don and Laura Aaron photo. Malachite with...photo. Heliodor (beryl), 11 cm, Padre Paraiso, Brazil. Joe Budd photo. Olmüte, 7 cm, N'Chwaning mine...citrine), 7 cm, from the Santa Clara pegmatite, Minas Gerais, Brazil. Joe Budd photo. Malachite, 7.2 cm, from |  | | Journal (issue) | | Collector—Part II Fify-nine treasure hunts in Minas Gerais, 1969–2005 . . . . . . . . . . . . . 207 by...field mineralogist for the Manhattan Project in Brazil in 1941, and served in the Army Signal Corp in...Collector—Part 2: Fifty-Nine Treasure Hunts in Minas Gerais, 1969–2005 Guido Steger Nestroystrasse 15 2700...been visiting mines and mineral occurrences in Brazil for 36 years, and has seen many now-famous discoveries...the gemstone mines and marketing centers of Minas Gerais, I sought first to learn about recent discoveries |  | | 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) | | deposits as remote and far apart as Afghanistan, Brazil, Kenya and Switzerland, and it appeared rather...a colourless beryl (a so-called goshenite) from Brazil, which had been cut so as to facilitate the inspection...(phlogopite, muscovite and niobite) in a goshenite from Brazil. 25 x Detail of Figure 1: cluster of pseudohexagonal...internal paragenesis of the second goshenite from Brazil. We recognize large brownish pseudohexagonal crystals...goshenite. Another goshenite, also excavated in Brazil, looked very similar to the afore-mentioned specimen |  | | Book | | materials Quartz crystals from Corinto, Minas Gerais, Brazil. Height: 15 cm. Sorbonne collection using...crys- Washing diamond-bearing gravel in Minas Gerais, Brazil. Photo: tals of such minerals as quartz...phrase ‘‘gem quality’ to de- from Salinas, Minas Gerais, well as an ‘‘ornamental stone.’ Amethyst...and a jeweler might then speak of a ‘root’ as Brazil Length: 9 cm. K. Proctor collection, United States... These unique conditions of gem prospecting in Brazil illustrate the willingness of men to endure extreme |  | | Journal (issue) | | Well-formed crystals also occur in Peru, Bolivia, Chile, Brazil, Japan and Mexico. 'Sand dollars' are particularly...was the rose cut. The discovery of diamonds in Brazil in the early decades of the eighteenth century...diamond-cutting industry based on rough being imported from Brazil. Bauer39 also quotes Geneva as the source of cut... A kunzit e cat's-eye weig hing 113.32 ct from Brazil is described as are phosgenites from Morocco. Schungite...artefacts were found to be manufactured from tremolite Yu or bowenite Yu (the latter mainly antigorite |  | | Journal (issue) | | Rossman The Indaia Sapphire Deposits of Minas Gerais, Brazil David S. Epstein, Warren Brennan, and Tulio...located in eastern Bolivia, near the border with Brazil [figure 2). The Anahi mine produces ametrine crystals...1986) described similar material purportedly from Brazil. There are also some accounts that the deposit...Anahi area and on importing the gem material into Brazil, early reports identified the source as being in...virtually impossible for gems mined in Bolivia to enter Brazil legally. To circumvent these restrictions, the |  | | Journal (issue) | | between Venezuela and Surinam and to the north of Brazil lies Guyana. The name comes from an Amerindian...which is the natural boundary between Guyana and Brazil. On this river lies the tiny community of Orinduik...circles are tremolite and actinolite, mostly because nephrite jade is a variety of them. Tremolite-actino...te form a solid solution series varying from tremolite (Ca2Mg5Si8022 (OH, F) 2 ), with increasing amounts...[v.v.v.1.1.1.1.1.1 F?W,K!v!\v!v!vW mmmmmmmmm Tremolite Kvf'XvXvXw^^ lllli ^^^^^^^^^^^M Actinolite |  | | Book | | altered are crystalline schists from which mica, tremolite and actinolite are captured by the emerald. Other...indicating a carbonaceous material. Emeralds from Brazil are usually full of thin liquid films and there...Habachtal in Austria contain tremolite, tourmaline and biotite; the tremolite crystals are acicular (needle-like)...chlorapatite. The Sandawana emeralds of Zimbabwe show tremolite crystals which are more hair-like than those of...of the Habachtal emeralds. The tremolite is also curved rather than straight. Transvaal emeralds have | | | Book | | altered are crystalline schists from which mica, tremolite and actinolite are captured by the emerald. Other...indicating a carbonaceous material. Emeralds from Brazil are usually full of thin liquid films and there...Habachtal in Austria contain tremolite, tourmaline and biotite; the tremolite crystals are acicular (needle-like)...chlorapatite. The Sandawana emeralds of Zimbabwe show tremolite crystals which are more hair-like than those of...of the Habachtal emeralds. The tremolite is also curved rather than straight. Transvaal emeralds have |  | | Journal (issue) | | Meta-Autunite, Sao Pedro mine, Malacacheta, Minas Gerais, Brazil, 2.0 x 2.1 x 1.5 cm, Mark Mauthner...Pyroxenite and metaperidotite: enstatite, actinolite, tremolite, hornblende, serpentine, talc, chlorite, vermiculite |  | | Book | | Richville. At Balmat and Taleville are talc, tremolite, and tirodite. These fluoresce yellow, orange...fluorescence are very attractive. SOUTH AMERICA Brazil contains several richly mineralized regions well...point of view of fluorescent minerals. From Minas Gerais are fluorescing crystals of zircon, topaz, beryl...Prehnite Roeblingite Scapolites Tale Thompsonite Tremolite Uvite Willemite Wollastonite Xonotlite orange...apatite crystals from Megina and Toca-daOnca, Minas Gerais, Brazil, about 1 centimeter across and 2 centimeters |
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