Peridot (pronounced PEAR-A-DOE or PEAR-A-DOT) is one of the few gemstones that occur in only one color: an olive-green. The intensity and tint of the green, however, depends on the percentage of iron that is contained in the crystal structure, so the color of individual peridot gems can vary from yellow, to olive, to brownish-green. It is also the birthstone for August and the 16 year wedding anniversary gemstone.
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