Southern Africa Diamond Offshelf-00-7151

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Republic of South Africa territory contains a large amount of commercial deposits of diamonds and other gemstones are being developed right now or has been developed earlier in four administrative areas:, Orange Republic, Cape Province and in Small Namaqualand.

In first three areas found to be a radical supplier of high quality jewelry gemstones and in particular diamonds, with smaller deposits in Namaqualand only, nevertheless worth of commercial exploration and land mining for other valuable natural resource land can give to men.

Looking ahead geologist and gemologist has jointly apprise the potentiality of land and perspectives of commercial exploration of diamonds and set to agree on a rather conservative assumption of what the potential worth. It it believed that stocks of diamonds of the republic of South Africa are estimated at 356 million carat, and on a share of jewelry classes it is necessary 125 million carat.

Diamond production of Southern Africa took in the world market leading positions to the XX th century middle. It has faced threat of a serious competition after opening Yakut and ...
... Australian provinces. To the middle of the XX th century a part of considerable deposits of Southern Africa have been fulfilled.

Botswana did not provide an appropriate gain, and De Bierce has extended the interests to Namibia and Botswana. A system the relations with these countries on principles of partnership, the company it was possible to keep behind the diamond mining industry of the republic of South Africa in the lead positions. Now on volume of extraction of the republic of South Africa takes the fifth place in the world, and on volume of cost of production the third.

Deposits of Transvaal. Finds of diamonds in Transvaal are known since 1880. They have been found out about the city of Pretoria in the river of Penar. Searches of radical sources in 1898 have led to opening of several small veins and tubes which did not possess large supplies and were maintained short time.

Wide popularity of a deposit of Transvaal have got after opening in 1902 rich deposits in pool of the river Vaal.
Within Transvaal radical deposits include tubes of Premieres, Shuller I and group of bodies of Veneshija which are the basic suppliers of diamonds of this region.

Tube of Premieres. On age is 1420 7 million years that is proved by various radio gene definitions and the geological data. Its area on a day surface is equal 31,57 hectares 914,4 457,2 . On depth of 538 m its size is reduced to 820 330 m.
In a tube classify to 1000 differences of the diamonds which most part to 48 in a class 9 11 and 28 in a class 17 19 brown color has. On the second place there are colorless crystals 40 . Meet also dark blue, grey, black, yellow and green. Especially appreciate ink blue stones. The raised quantity of large stones more than 100 carat on weight in this connection the sparing technology of their extraction from breed here has been applied is characteristic for a deposit. There was a case when a crystal in weight of 1640 carat has been shattered at ore processing. On mine fatty installations and heavy liquids for the first time are applied.

In the form and color characteristics diamonds of a tube of Premieres are rather specific tab. 14 because of the raised quantity of fantasy versions and low maintenance forms.

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