 | | Journal (issue) | | Malagasy lapidary facility • Ruby and sapphire from Colombia • Lavender sugilite with green spots • Paraíba...single copies or back issues to the Subscriptions Department. To obtain a Japanese translation of Gems & Gemology...scientist, in the mineralogy and petrography department at the Museum of Natural History, Vienna, Austria...solid solution with ilmenite), spinel (hercynite, magnetite, gahnospinel, and/or cobalt-spinel), uraniumpyrochlore...Sutherland F.L. (1995) An unusual sapphire-zircon-magnetite xenolith from the Chanthaburi gem province, Thailand |  | | Journal (issue) | | discovery in Canada • Gem-quality corundum from Colombia • Emeralds from Madagascar with strong blue/green...After the 2003 Tucson gem shows, the customs department of Madagascar temporarily froze the export of...(for comparison, the organic black shales at Muzo Colombia, thought to be the source of beryllium for the...rough was faceted in Thailand (and in Bogotá, Colombia, for some melee-size material), and then the polished...chairman of the Brigham Young University Geology Department, in Provo, Utah. ACKNOWLEDGMENTS: The authors |  | | Journal (article/letter/editorial) | | of these are drained by tributaries of the Yaqui, Mayo, and Fuerte rivers, which downstream flow through...South of Yécora streams flowing southward to the Río Mayo have a relatively direct course to the sea and...general elevation of about 4900 feet. Along the Río de Tubares below Tubares (Co-ord F&G-VI) are rock-cut...terraced loops; similar features are seen on the Río Mayo (Co-ord E-IV). The barranca section gives place...extreme dry period of June even the Rios Yaqui and Mayo are hardly more than chains of pools separated by |  | | Journal (issue) | | Coenraads et al. (1990); from the Mercaderes–Rio Mayo area in southwest Colombia, related to northern Miocene...zircon megacrysts from the Mercaderes– Rio Mayo area, South-west Colombia, South America. Ore Geology...study of inclusions in gem corundum from Mercaderes, Cauca, Colombia. Physics and Chemistry of Minerals, Vol...became the administrative headquarters of the Roer department in 1802 and acquired French status. Relics that...Henry Papounaud, past curator of the jewelry department of the Palace of Tau Museum, as well as Jean- |
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