 | | Journal (article/letter/editorial) | | brucec@uj.ac.za TSAVORITE The Green Gem Variety of Grossular Merelani Hills, Manyara District, Tanzania ...hibschite, hydrogrossular (Transvaal jade), and tsavorite, the emerald-green grossular. Variably colored...depth and intensity of color to be considered tsavorite?” The answer is not straightforward but depends...superseded by the accepted name tsavorite (Bridges 1974). The term tsavorite is used here where the appropriate...literature for a locality specifically mentions tsavorite and provides op252 ROCKS & MINERALS tical and/or |  | | Journal (article/letter/editorial) | | chemical classification of V,Cr-rich grossular (tsavorite). Adjacent dark, graphite-rich phyllites were...V., Pezzotta F. (2012) Tsavorite and other grossulars from Itrafo, Madagascar. Gems Gemol. 48, 178-187...contact-metamorphosed Silurian SEDEX deposits in the Poblet area, southwestern Catalonia, Spain. Can. Mineral. 41...Saul M. (2013) New aspects and perspectives on tsavorite deposits. Ore Geol. Rev. 53, 1-25. Bull. mineral...Lallier F. (2014) New typology and origin of tsavorite based on trace-element chemistry. Eur. J. Mineral |  | | Thesis/Dissertation | | ............. 22 2.5.3.1.2.5. Antetezambato, Madagascar ............................................................................. 25 2.5.4.1. Tsavorite ............................................................................ 27 2.5.4.1.1.3. Madagascar ............................................................................. 28 2.5.4.1.2. Tsavorite geochemistry ....................................................... 40 2.5.9.1.1.2. Bekily, Madagascar ............................................ |  | | 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 |  | | Journal (issue) | | characteristic infrared absorption feature at 2800 cm–1. The area SUMMER 2018 115 DISTRIBUTION OF HUE AND SATURATION...stains after faceting, particularly in the girdle area (again, see figure 11), to provide confirmation...creating a transmission window within the green area. For brown radiation stains, the color is determined...these diamonds are ~700 Ma kimberlite sills in the area (Kaminsky et al., 2000, 2004), and the lack of abundant...Khachatryan-Blinova G.K. (2000) Diamond from the Guaniamo area, Venezuela. Canadian Mineralogist, Vol. 38, No. |  | | 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) | | 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 |
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