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$18,000 Peridot, the light green August birthstone, is also known as chrysolite. While gem collectors typically go for the more valuable green gemstone, emerald, peridot is impressive all on its own.

Peridot, spinel and sardonyx are the birthstones for August. Peridot is a yellow-green gemstone. In the past, it was confused with other gems, such as topaz and emerald. The gemstone is often ...