The birthstone of August, Peridot is the gem-quality variety of the mineral Olivine. It is found around pockets of volcanic activity, such as lava flows, and occasionally within meteorites. Peridot has been mined since the time of Ancient Egypt, when the main source for it was near the Red Sea. Now most deposits are located in the U.S., China, and Vietnam.

Peridot comes in various shades of green, usually with yellow or brown tints. The finest peridot stones are a grass-green color.

In ancient times, peridot was often confused for other gemstones, including emeralds and topazes. To this day there is dispute as to the origin of the name, with some sources citing French, and others Arabic, roots.