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Miners use shovels and sluicing equipment to search for diamonds near the Vaal River in South Africa.
Multi-colored gems are superimposed on an image of glacier peaks.
A close-up image of a pile of rough diamonds.
An early black and white photo that shows deep trenches dug into the ground in the search for diamonds. Ladders and ropes help the miners excavate and traverse the mine.
A large ruby crystal in calcite with three faceted rubies in front.

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Gems & Gemology
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