| northwestern Pakistan|‘Black’ axinite |
Beryl from Tanzania with phenakite inclusions |
Clinohumite from Vietnam |
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Galopim de Carvalho, Rui (2024) Gempedia. AIGS. |
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| chromium-bearing translucent intense green variety from Tanzania known in the trade as smaragdite. It is a major...notably in Sri Lanka and also in India, Myanmar, Tanzania, Madagascar and USA (New Mexico). From Adular...5000 BCE and for the red spinels in the Parnir region in present day Tajikistan, formerly known as "balas...the east coast of Africa. between Zanzibar in Tanzania to Inhambane in Mozambique, that are produced...(Minas Gerais), Camafba (Bahia) and Urua~u (Goias), Tanzania (Lake Manyara, Tunduru), India (Orissa, Kerala |
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O'Donoghue, Michael (2006) Gems : their sources, descriptions and identification (6th ed.) Butterworth-Heinemann. |
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| an inner solid region of diameter 2440 km and density about 8 gcm3, and an outer region about 2260 km...alumina, alkalis and the rarer elements. If the region is quiescent and all the magma solidifies in the...if about half way through crystallization, the region becomes 8 Rocks and the Processes That Formed... More recently, it has been found that where a region is saturated with water, jadeite can form in veins...Geological Sources of Gems In the Merelani region of Tanzania, veins containing tanzanite and tsavorite |
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(2006) The Journal of Gemmology Vol. 30 (1-2) Gem-A |
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| Usambara Mountains, south of the Umba area in Tanzania, and was introduced by Halvorsen and Jensen (1997a...or red in artificial light in tourmalines from Tanzania, and although their searches for previous examples...1970 Crowningshield reported a rare garnet from Tanzania, which was found to be an isomorphous mixture...(1961) described tourmalines from the Gerevi Hills, Tanzania, which appeared red under a Chelsea colour filter...focus in recent publications on gemstones from this region? UE tourmalines also occur in the John Saul ruby |
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Moore, T.P. (2016) Moore's Compendium of Mineral Discoveries 1960 - 2015 Vol. 2. Mineralogical Record Inc. |
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| localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during...about 20 other quartz mines are operated in the region of the Subpolar Urals, northwest of Saranpaul,...collected intermittently from pegmatites of the region, associated with crystals of corundum, rutile, |
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Dill, Harald G. (2010) The “chessboard” classification scheme of mineral deposits: Mineralogy and geology from aluminum to zirconium. Earth-Science Reviews, 100 (1) 1-420 doi:10.1016/j.earscirev.2009.10.011 |
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| Polydymite Polyhalite Porpezite Poudretteite Powellite Prehnite Pretulite Priceite Priderite Proustite...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...make a contribution to the cultural heritage of a region and may successfully be used in exploration (Mascaro...two years. The economic potential of a particular region or mining camp can be deduced from the economic...about 50% of them concentrated in the Steelpoort region of the eastern Bushveld Complex. Stratiform deposits |
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Dill, Harald G. (2010) The “chessboard” classification scheme of mineral deposits: Mineralogy and geology from aluminum to zirconium. Earth-Science Reviews, 100 (1) 1-420 doi:10.1016/j.earscirev.2009.10.011 |
Journal (article/letter/editorial) |
| Polydymite Polyhalite Porpezite Poudretteite Powellite Prehnite Pretulite Priceite Priderite Proustite...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...make a contribution to the cultural heritage of a region and may successfully be used in exploration (Mascaro...two years. The economic potential of a particular region or mining camp can be deduced from the economic...about 50% of them concentrated in the Steelpoort region of the eastern Bushveld Complex. Stratiform deposits |
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Dill, Harald G. (2015) The Hagendorf-Pleystein Province: the Center of Pegmatites in an Ensialic Orogen - Modern Approaches in Solid Earth Sciences No. 15. Springer International Publishing. doi:10.1007/978-3-319-18806-5 |
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| the same passion for minerals and the NE Bavarian region. The Oberpfalz was his home and my adopted country...the principal techniques of deep geophysics, this region enables us to look at the origin of pegmatites...to find new profitable mineral deposits in the region are not very promising and mining in Germany is...mining was the reason for people to settle in a region but likewise the focal point of geoscientists to...ore deposit (Čech et al. 1971). In the Luc Yen region, Vietnam, the amazonite pertains to a group of |
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