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Each diamond has to be appraised based on cut, clarity, and rating.oh, and carat weight.
De Beers is a family of companies that dominate the diamond, diamond mining, diamond trading and industrial diamond manufacturing sectors. De Beers is active in every category of industrial diamond mining: open-pit, underground, large-scale alluvial, coastal and deep sea.
De Beers workers in South Africa will strike from tonight over pay, becoming the latest miners to down tools after Glencore Xstrata Plc employees walked out in May.
Strikes will go ahead at the Voorspoed operation in Free State province, Kimberley in Northern Cape province and Venetia in Limpopo province even as talks continue, said Peter Bailey, a negotiator for the National Union of Mineworkers. The action will also affect the company’s trading arm, Diamond Trading Co.