 | | Journal (issue) | | Update on Emerald Mining at Campos Verdes, Goiás, Brazil | Asteriated Quartz Sphere with Sagenitic Rutile...Liddicoatite Paraíbatype Tourmaline | Gemquality Variscite from Central Iran | Copper-bearing Silicified...Verdes, Goiás, Brazil Campos Verdes, located about 20 km north of Santa Terezinha de Goiás in Goiás State...State, Brazil, was an important source of gem-quality emerald in the 1980s. The mineralisation is hosted...Laboratory Balneário Camboriú, Santa Catarina, Brazil a Figure 2: Rough emeralds from the Lúvio Verde |  | Dyar, M. D., Jawin, E. R., Breves, E., Marchand, G., Nelms, M., Lane, M. D., Mertzman, S. A., Bish, D. L., Bishop, J. L. (2014) Mössbauer parameters of iron in phosphate minerals: Implications for interpretation of martian data. American Mineralogist, 99 (5) 914-942 doi:10.2138/am.2014.4701 | Journal (article/letter/editorial) | | Lavrada, Paraíba, Brazil Boqueirãozinho pegmatite, Parelhas, Rio Grande du Norte, Brazil Boqueirãozinho...Boqueirãozinho pegmatite, Parelhas, Rio Grande du Norte, Brazil Baviere, Germany Tip Top Mine, Custer Co., South Dakota...pegmatite, 12 km south of Pedra Lavrada, Paraíba, Brazil Big Fish River, Yukon, Canada Les Moulins Mine...Morocco Lavra da Cigana, Galileia, Minas Gerais, Brazil Hagendorf, Bavaria, Germany Messel, Darmstadt,... Hesse, Germany Cigana Mine, Galileia, Brazil Mina Colavi, Saavedra Prov., Potosí Dist., Bolivia Hagendorf |  | | Journal (issue) | | occurrences as well as naturally blue coloured topaz from Brazil, Nigeria and Zimbabwe, were spectroscopically investigated... lou colour zoning natural untreated blue topaz, Brazil, Nigeria, Zimbabwe xi ' o "o w <-> 3 a S-i...emeralds emeralds from On the Terezinha de Goiás, Goias, Brazil Brazil Santa Terezinha Takishi Miyata, Miyala...Abstract from Santa Sama Terezinha Terezinha de Goiás, Goi:is, Inclusions in emeralds from investigated...electron electron microprobe microprobe analysis Brazil, are investigated determined as pyrite, (EPMA) |  | | Catalog/List | | In the early 1980s Rock began to concentrate on Brazil and Peru with occasional trips to Uruguay, Chile...Another was the 7,500+ quartz in Minas Gerais, Brazil: a micromount collection. And of course, there..............................................196 Brazil..................................................HA.com/5445 72057 Variscite, Crandallite & Wardite Little Green Monster Variscite Mine, Clay Canyon,... Utah, USA “A polished slab of variscite showing the green variscite, the yellow crandalite and the grey |  | | Journal (issue) | | geology, and notable localities of diamond mining in Brazil, and outlines plans for future diamond production... Svisero, James E. Shigley, and Robert Weldon Brazil, which commanded global production in the 1700s...Gerais and Mato Grosso, are presented. W hile Brazil is widely known for the production of colored gemstones...deposits. According to Kimberley Process statistics, Brazil produced 31,825 carats in 2015, although this figure...Despite its low output relative to other sources, Brazil has produced a significant number of large rough |  | | Journal (issue) | | Update on Namibian demantoid garnet • Kyanite from Brazil • South Sea cultured pearls with broken beads •...alluvial workings along the interior rivers of Brazil, particularly in the region called Triangulo Mineiro...16, pp. 97–98. Cassedanne J. (1989) Diamonds in Brazil. Mineralogical Record, Vol. 20, No. 5, pp. 325–336...analysis. The material had been represented as variscite, an essentially colorless aluminum phosphate that...when iron and chromium are present. Green-blue variscite is often used as an ornamental stone, or dyed |  | | Journal (issue) | | ARTICLES 260 An Update on “Paraíba” Tourmaline from Brazil James E. Shigley, Brian C. Cook, Brendan M. Laurs...corundum from Wyoming • Green kyanite from Bahia, Brazil • “Ruby Rock” cabochons • Tourmaline from Warner...More recently, Brendan has visited Madagascar and Brazil to obtain first-hand knowledge of important gem...of gemological topics: “Paraíba” tourmaline from Brazil, spessartine garnet from California, Malaya garnet...2001 259 AN UPDATE ON “PARAÍBA” TOURMALINE FROM BRAZIL By James E. Shigley, Brian C. Cook, Brendan M. |  | | Journal (issue) | | Tourmalines from New Deposits in Paraíba State, Brazil Type Ia Diamond with Green-Yellow Color Due to...Iron Colorants in Gem Tourmalines Andalusite from Brazil Peridot from Sardinia, Italy Fall 2009 Characterization...Tanzania (35569), and 19.90 ct spessartine from Brazil (33238); photo by Robert Weldon. REFERENCES Deer...than starting material from other sources (e.g., Brazil), and therefore the decay times presented in this...diamonds from the Juina-5 kimberlite in Mato Grosso, Brazil. These unusual diamonds host inclusions with compositions |  | | Report (issue) | | 15001, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil ABSTRACT The southern Brazilian Shield comprises...of orogenic evolution can be observed throughout Brazil. The Brasiliano belts cannot be directly linked...Gondwana assembly. Precambrian units in southernmost Brazil (in the state of Rio Grande do Sul) record a tectonometamorphic...and age data with other Neoproterozoic belts in Brazil, southwestern Africa, and other Gondwana belts...units (Fig. 2C) can be distinguished in southern Brazil (Jost and Hartmann, 1984; Soliani, 1986; Fragoso-César |  | | Journal (article/letter/editorial) | | gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet...Canada, Dore Lake, Australia, Campo Formoso, Bahia-Brazil) (Barnes and Francis, 1995; Leinonen, 1998; Kojonen...ultrabasic rocks such as in the Bacuri Complex-Amapa, Brazil (Spier and Filho, 2001). Further sites are found...Niquelandia–New Caledonia–type occur at Niquelandia, Brazil (Garnier et al., 2006), Koniambo, New Caledonia–France | | | Journal (article/letter/editorial) | | gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet...Canada, Dore Lake, Australia, Campo Formoso, Bahia-Brazil) (Barnes and Francis, 1995; Leinonen, 1998; Kojonen...ultrabasic rocks such as in the Bacuri Complex-Amapa, Brazil (Spier and Filho, 2001). Further sites are found...Niquelandia–New Caledonia–type occur at Niquelandia, Brazil (Garnier et al., 2006), Koniambo, New Caledonia–France |  | | Book | | Australia Ying Gu 8th 2004 Aguas de Lindoia, Brazil Henrique Kahn 7th 2000 Göttingen/Hannover,...Bjørn Eske Sørensen Norway Dr. Carina Ulsen Brazil Prof.Dr. Rolf Arne Kleiv Dr. Prof.Dr. Rune B...Department, University of Sao Paulo, Engineering School, Brazil Abstract The implementation of X-ray diffraction...study, 69 bauxite samples from Porto Trombetas, Brazil were classified by cluster analysis. Results led...the Porto Trombetas region in the state of Pará, Brazil. The samples were classified on the mining site |  | | Book | | čiernohnedý, tvorí hľuzy a náteky, alebo iba povlaky na variscite. DENDRJTICKÝOPÁL (do 0,05 mm) v muskovite a...Baňa. GOYAZIT (Damour, 1884)Pomenovaný podľa štátu Goiás(Brazília). Trigonálny.T 4,5.F citrónovožltá, ružová |
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Goiás, Brazil