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Ajoite in quartz from Messina District, South Africa (size: 16.9 x 3.7 x 3 cm.) Ajoite is named after its type locality , the New Cornelia Mine in the Ajo District of Pima County , Arizona . Type material is conserved at the National Museum of Natural History , Washington DC, US, reference number 113220.
First found in the United States, unakite has a worldwide distribution, having also been reported in South Africa, Sierra Leone, Brazil, China, India and Australia. Some material labeled unakite lacks the feldspar and is more properly called epidosite , and is also used as beads and cabochons .
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 ...
The Central African Republic did not produce mineral fuels in 2006 and depended upon imports for its energy requirements. United Reef Ltd. of Canada obtained the rights to a petroleum exploration permit in the country through a "farm-in agreement" with Denver-based RSM Production Corp. in 2004. It was unable to continue with its exploration ...
The company, Anglo-Transvaal Consolidated Investment Company Limited, was formed in Johannesburg, South Africa in June 1933. [1]: 48 It was the creation of mining engineer A.S. (Bob) Hersov, stockbroker Simeon (Slip) G. Menell and Norbert S. Erleigh with the purpose of reopening closed mines after the price of gold rose.
Metorex is a mining company based in Johannesburg, South Africa. It has assets in the Democratic Republic of the Congo (DRC), Zambia and elsewhere. [2] A takeover bid by the Jinchuan Group of China valued the company at US$1.1 billion. Since January 2012, the company is a wholly owned subsidiary of Jinchuan Group.
With the passage of time, the importance of the Confidence Reef grew, not only in terms of its role in mining activities but also in relation to its status as a site of South African heritage. [ 1 ] In recognition of its historical value, the Confidence Reef Mine was proclaimed a national monument in 1980.
African Rainbow Minerals Limited is a mining company based in South Africa. ARM has interests in a wide range of mines, including platinum and platinum group metals (PGMs), iron , coal , copper , and gold . [ 2 ]