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Smoky quartz is a brownish grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray or black crystals. [6] The color of smoky quartz is produced when natural radiation, emitted from the surrounding rock, activates color centers around aluminum impurities within the ...
Spessartine on smoky quartz: Wushan Spessartine Mine, Tongbei, Fujian Province, China Reddish-orange spessartine Two "frog-eyes" of 1.8 cm each sit perched atop a matrix
WestProp Holdings Ltd, formerly West Property Company Pvt Ltd was founded in 2007 by Kenneth Sharpe as a publicly traded property development company. [3] The company is known for its flagship developments projects that include Gunhill Rise, [4] Millennium Heights, [5] [6] Pokugara residential estate [7] and mixed use smart city projects at Pomona city, [8] [9] Warren Hills Golf Estate [10 ...
Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...
In 1979, Gemstones Corporation of Pakistan was established to develop the gemstones sector in Pakistan, however in 1997 the corporation liquidated. [3] Now a number of organizations are working in this sector including All Pakistan Commercial Exporters Association of Rough & Unpolished Precious and Semi Precious Stones (APCEA) and Pakistan Gems and Jewellery Development Company (PGJDC).
In 1975, Telequartz Group, financed X-tal do Brasil factory producing oscillators and high quality optic fiber made by their own artificial quartz produced in laboratory. In 1988, Telequartz reached a joint venture with CVRD and Nisso Iwai Ltd. to build a U$20 million quartz powder plant in Minas Gerais, Brazil. The powder is an important ...
A rough specimen of bloodstone. Heliotropes (from Ancient Greek ἥλιος (hḗlios) 'sun' and τρέπειν (trépein) 'to turn') (also called ematille, Indian bloodstones, or simply bloodstones) are aggregate minerals, and cryptocrystalline mixture of quartz that occurs mostly as jasper or sometimes as chalcedony (translucent).
The Company was incorporated in February 1924 as The St Martins-Le-Grand Property Company Limited to carry on the business of property investment. [ 2 ] The company started to expand after the war years and in 1947 it merged with the Cheapside Land Development Company Limited which owned a number of London office properties.