Crater of Diamonds State Park in Arkansas is the only state park in the U.S. where you can dig for diamonds and keep them. You'll also be able to find gems like quartz, agate, garnet, and jasper ...
Mineral deposits can create markings that look like forests or mountains, and experts say each stone is distinctive. By Jill Newman When Tarun Adlakha displays a dendritic agate, with its finely ...
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