Diamonds form rare gemstones commercially mined from kimberlite, lamproite and placer deposits primarily around old continental cores known as cratons. Minor diamond mineralization is also found in other rock types - such as some lamprophyres, but so far, these remain uneconomical. When diamond-bearing rocks erode, they leave behind trails and clues for geologists and prospectors. Learn these clues well, because diamond deposits are very difficult to find.
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HOW BLUE IS BLUE GROUND?
Dry placer (?) at Cedar Mountain, Wyoming. These rounded boulders and cobbles are part of a lamprophyre breccia pipe that has abundant ma...
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Dry placer (?) at Cedar Mountain, Wyoming. These rounded boulders and cobbles are part of a lamprophyre breccia pipe that has abundant ma...
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A legal alien searches for diamonds among the stars (pencil sketch by the GemHunter ). Where does diamond come from? A jewelry store? Y...
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Twin Mountains crypto-volcanic structures south of I-80 between Laramie and Cheyenne. A few of the many 'kimberlitic' indicator ...