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A sorter works at a table lined with sorted piles of diamond rough.
Miners, working in a row along a body of water, use hand sieves to sift gravel.
Miners use shovels and sluicing equipment to search for diamonds near the Vaal River in South Africa.
Karyna Sena stands in front of a sapphire mine near Colombo, Sri Lanka.
A close-up image of a pile of rough diamonds.
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