 | | Journal (article/letter/editorial) | | Faceting-grade crystals occur in Switzerland, Brazil, and China, but they are extremely rare and tend...347 Figure 2. A faceted 0.90-carat staurolite, Brazil. Robert J. Lauf specimen No. 4572. Figure 3. Simple...bow-tie twin, 3.7 cm tall, Rubelita, Minas Gerais, Brazil. John White specimen, Jeff Scovil photo. Figure...Blocky 60-degree twin, 2.5 cm long, Minas Gerais, Brazil. Paul and Janet Clifford specimen, Janet Clifford...The extensive Precambrian metamorphic terrain in Brazil has produced many fine specimens. Twinned and untwinned |  | | Journal (issue) | | right: Topaz, 8.4 cm, from Ouro Preto, Minas Gerais, Brazil. Lower left: Phosphophyllite, 2 cm, from the Unificada...Andrea Bartorelli: Minerals and Precious Stones of Brazil. Other important references (if any) for individual... 5.5 cm, from the Alto da Cabeca mine, Parelhas, Rio Grande do Norte, Brazil. Will Johnson collection...beryl, 7.5 cm, from near Araçuai, Minas Gerais, Brazil. The find predates the discovery of morganite at...to get this specimen, a complete floater, for my Brazil collection); Tom Spann photo. Reference: Cassedanne |  | | Journal (issue) | | with crown of lepidolite, from Virgem da Lapa, Minas Gerais, Brazil. (For more on the locality see the article...March-April, 1985 Recent discoveries of Phenakite in Brazil J. P. Cassedanne Instituto de Geociencias Cidade...Universitaria Ilha do Fundao. 29910 Rio de Janeiro, Brazil INTRODUCTION Phenakite, Be2Si04, occurs in granitic... The finest specimens known, however, are from Brazil, where two new occurrences have recently been discovered...(1929) also observed dark smoky quartz, hematite, pyrite, xenotime, red almandine and rare monazite. Over |  | | Book | | MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA © 2009 - CARLOS CORNEJO...photographs: "Parafba" tourmaline (25 x 6 mm), Sao Jose da Batalha, Parafba. Courtesy of Bruno and Rolando Gioia...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) | | from St. Andreasberg, Harz Mountains, Germany. (9) Pyrite, 2.4 cm, from Gerensegen, Schwarzwald, Germany...Gerais, Brazil. (4) Humite, 2.3 cm, from Mount Somma, Italy. (5) Palladium, 2.1 cm, from Brazil. (6) Mellite...from the Jequitinhonha River area, Minas Gerais, Brazil. 4 Refined Elegance, a Supplement to The Mineralogical... from Minas Gerais, Brazil. (10) Chrysoberyl, 2.4 cm, from Minas Gerais, Brazil. (11) Euclase, 2.1 cm...cm, from Minas Gerais, Brazil. (12) Olivine, 2.7 cm, from St. John’s Island, Egypt. given the poorly |  | | Journal (issue) | | rhodochrosite, 2.59 ct ParaĂba tourmaline from Brazil, 8.51 ct Sri Lankan spinel, 13.00 ct Madagascar...“padparadscha” sapphire, 2.12 ct ParaĂba tourmaline from Brazil. Photo of stones © GIA and Harold & Erica Van Pelt;...presents a poster on golden rutilated quartz from Bahia, Brazil. Near right: Designer Michael Bondanza discusses... Urals in Russia, northern Minas Gerais and Bahia in Brazil, Nepal, and Arkansas in the U.S. • Typical...brookite, titanite, carbonates (calcite, siderite), pyrite, black tourmaline (schorl), cavities after anhydrite |  | | Journal (issue) | | Madagascar • Phenomenal fire opal • “Sunset” quartz from Brazil • Swedish Blue (slag) and Swedish Iron Ore • Tourmaline...cultured pearls • Treated violetish blue quartz from Brazil • Circular inclusions in a diffusion-treated sapphire...DIAMONDS (Fontanella et al., 1977; Balzaretti and da Jornada, 1996). As a result, when examined with crossed...GEMOLOGY WINTER 2006 219 REFERENCES Balzaretti N.M., da Jornada J.A.H. (1996) Pressure dependence of the...Winter 2001 An Update on “ParaĂba” Tourmaline from Brazil Spessartine Garnet from San Diego County, California |
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