 | | Journal (article/letter/editorial) | | Gem Variety of Grossular Merelani Hills, Manyara District, Tanzania G rossular, Ca3Al2(SiO4)3, was named...discovery site of tsavorite is the Lemshuku mining district, northeast Tanzania (Bridges 1974). However, tsavorite...tsavorite deposits including the famous Scorpion district. Prepared by William Besse. layers. The origin...mine (Wamunyu et al. 2014, 2015) in the Mwatate area of Taita-Taveta County, where tsavorite occurs as...axinite-(Mg), chromian diopside, fluorapatite, graphite, and pyrite (figs. 12–14). East African tsavorite |  | | Journal (article/letter/editorial) | | Cr-rich grossular (tsavorite). Adjacent dark, graphite-rich phyllites were probably the source of Cr...(2012) Tsavorite and other grossulars from Itrafo, Madagascar. Gems Gemol. 48, 178-187. Benkerrou C., Fonteilles...contact-metamorphosed Silurian SEDEX deposits in the Poblet area, southwestern Catalonia, Spain. Can. Mineral. 41 |  | | Book (volume) | | figurent pas dans ceux-ci. En ce qui concerne Madagascar, d’où documents nouveaux, offrant un intérêt...coloration brun rouge. GISEMENTS ET ASSOCIATIONS Madagascar. — J’ai donné le nom d’ampaugabéite [C. B. CXLIV...ANrHOPHYLLITE-GÉDRITE (ï. p. 035; 1 , T. VI, p. 784). — Madagascar. J’ai rencontré [B. S.M. XXXV. 97. 1912) un...à Antanety, à 1”W. de Maizimanjaka (au S. W. de Betafo). Ce minéral forme des masses fibrolamellaires...micaschistes mont Bitv). IV, p. 787). — Madagascar. J’ai visité le gisement d’Ambatoarina, d’où |  | | Journal (issue) | | field was adjusted to subtend a maximal surface area across only the emerald surface. The EDX was operated...Muzo and Cosquez lie in the Muzo Belt (the 1226 area) trending NNE along the western fringe of the emerald...kilometres east of Chivor in the Chivor Belt (the 1228 area) trending NE along the southeastern fringe. By performing...around organic black shales in the western 1226 area (Guavio-Macanal) and carbonaceous black shales with...intercalated dolomitic limestone in the eastern 1228 area (Rosablanca formation and Paja formation) (Cheilletz |  | | Thesis/Dissertation | | ............. 22 2.5.3.1.2.5. Antetezambato, Madagascar ........................................................................... 27 2.5.4.1.1.3. Madagascar ................................................................... 40 2.5.9.1.1.2. Bekily, Madagascar ........................................................................... 42 2.5.9.2.2.2. Madagascar ................................................................. 42 2.5.9.2.2.3. Tranoroa, Madagascar............................................. |  | | Journal (issue) | | p.BCr1 GIA G&G Spring ʻ11 Journal #20183-0 Madagascar Demantoid Andesine and Zircon from China Vietnamese...Demantoid and Topazolite from Antetezambato, Northern Madagascar: Review and New Data Federico Pezzotta, Ilaria...northeastern China. 42 Aquamarine from the Thuong Xuan District, Thanh Hoa Province, Vietnam Le Thi-Thu Huong...near the village of Antetezambato, in northern Madagascar, emerged as an important source of demantoid... The Bulgari necklace in white gold features Madagascar demantoid (107.47 carats total weight), round |  | | Journal (issue) | | Opal-calcite composite • Update on sapphire mining in Madagascar • Zoned scapolite from India • Dumortierite-quartz...INFLUENCE The source is the Mogok region of Burma…an area forbidden to foreigners since 1963…The ancient alluvial...source directed from the viewpoint, we looked for the area where the blue adularescence was the strongest and...Meanwhile, an unusual residual flat high-relief area (again, see figure 5) was observed in sample 2,...they were collected at the strongest iridescence area (perpendicular to the polysynthetic twinning plane) |  | | Journal (issue) | | (Zimbabwe): A Result of Natural Irradiation and Graphite Inclusions Karen V. Smit, Elina Myagkaya, Stephanie...combination of tiny, methane-associated graphite inclusions, graphite needles, and brown radiation stains...mechanism—microinclusions of grayish clouds or tiny graphite particles in gray diamonds—can be distinguished...characteristic infrared absorption feature at 2800 cm–1. The area SUMMER 2018 115 DISTRIBUTION OF HUE AND SATURATION...micro-inclusions that have been identified as graphite (Smit et al., 2016; Eaton-Magaña et al., 2016) |
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