 | | Journal (issue) | | geology, and notable localities of diamond mining in Brazil, and outlines plans for future diamond production...Summit • Color-change pyrope-spessartine with high grossular component • Plastic imitation of amber • Mixed-type... Svisero, James E. Shigley, and Robert Weldon Brazil, which commanded global production in the 1700s...principally in the states of Minas Gerais and Mato Grosso, are presented. W hile Brazil is widely known for...Jequitinhonha River near the village of Arraial do Tijuco (later named Diamantina) in the state of Minas Gerais |  | | Journal (issue) | | found in the seas off the south-eastern USA to Brazil and N. subnodosus in the seas off western Central...Physics/ICEB, Federal University ofOuro Preto, Minas Gerais, Brazil 2. Department of Mining and Geology, Federal...Federal University of Paraíba, Brazil Abstract: Over the past decade, there has been noticeable growth...opaque and produce a 'silvery skin'. Light yellow grossular turns to orange similar to that of Imperial-topaz...preliminary diffusion treatment of some rough grossular has produced attractive green and orange stones |  | | Journal (issue) | | 0026-4628 'Continued on p. 415 Articles Diamonds in Brazil .................................................Moore Phosphate minerals from the Leveaniemi iron mine, Svappavaara, Sweden .............................Hollabaugh Laueite from Hagendorf-Siid andthe Palermo mine ................. 363 by L. C. Pitman New data...image of a crack hidden in the back (roof) of a mine adit (from A. P. Annan etal. (1988) Radar sounding...Fundao 21.910 Rio de Janeiro, Brazil Since their discovery in Minas Gerais, near the town of Diamantina |  | | Journal (issue) | | Cearâ-Brésil. (Gamets of Poço dos Cavalos, Cearâ, Brazil.) Revue de Gemmologie, 62, 5-8,9 figs, 1980. The...found near the village of Mwakijembe in the Umba Valley of Tanzania. RI is given as 1.75-1.76. A variety...Grande de Sol [sic? Rio Grande do Sul] in southern Brazil. M.O'D. KANE (R. E.). Developments and highlights...clinopyroxenites have been found on the Kantegir river, West Sayan, U.S.S.R. Some of the jadeite was coloured...Tanzania are proving to be a new spessartite/pyrope/grossular combination hitherto unrecognized. The name Malaya |  | | Journal (issue) | | 522 J.Gemm., 1981, XVII, 8 GARNETS FROM UMBA VALLEY, TANZANIA: IS THERE A NECESSITY FOR A NEW VARIETY...Idar-Oberstein, W.Germany ABSTRACT The garnets from Umba Valley, Tanzania, consist of solid solution series of...originate from one or more placer deposits in the Umba Valley, Tanzania, and were first sold without an exact...investigations of other garnet specimens from the Umba Valley. The so called 'Malaya-garnets' are members of...described by Jobbins et al (1978) from the Umba Valley, Tanzania, and by Schmetzer & Ottemann (1979) from |  | | Book (volume) | | ANDFINSCH KIMBERLIT'ES, SOUTHAFRICA, ANDWILLIAMSON MINE, TANZANIA H.-M. Tsai, O. A. Meyer, 0. Moreau, and...FROM KIFYBERLiTES IN THE COLORADO-WYC•ING STATE mINE DISTRICT 42 M. E. McCal!um, C. D. Mabarak, and... J. Ferguson, an• L. P. Black KiPzBERLIT•S IN BRAZIL: •i• INITIAL and DIAMOND C. R. Clement, REPORT...MINERAL CHEMISTRY OF A KIMBERLITE FROM THE PR•I•IER MINE: I•iPLICATIONS FOR THE EVOLUTION OF KiFmEHLITIC...mantle. In tro duct i on Introduction kimberlite mine The The Finsch Finsch Pipe Pipe is is aa major kimberlite |  | | Journal (issue) | | feldspar from Congo • Fluorite from the Rogerley mine, England • Demantoid garnet from Iran • Kyanite...tourmaline has come from Madagascar’s Anjanabonoina mine and contains remarkable color zoning, as shown by...Queen pegmatite mine in the Pala district of San Diego County, California, with mine owner Ed Swoboda...Swoboda. This mine has produced large amounts of gem tourmaline, for cut stones and mineral specimens. Photo...natural grossular garnet) that had been “fashioned” to look like it was fresh from the mine. Some gemologists |  | | Book | | L.V. 558 Zeilic B.S. 682 648,649 Zhang H. Valley J.W. 83 Zhang P. Vannucci R. 700 Zhang R.Y...underlying the SW Sao Francisco craton margin, Brazil: clues to the origin of EMI-type enriched mantle...and associated rocks from the Alto Paranaiba, SE Brazil..........101 Kimberlite magmatism of the Ukraine...with ultramafic rocks in the Catalao-I Complex, Brazil: possible implications for mantle metasomatism... .287 Mineral inclusions in diamonds from the River Ranch kimberlite. .289 The first finding of Cr-Sr-loparite-type |
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