Featured Gemstone: PERIDOT Peridot is the term for gem quality Olivine, a common mineral prevalent all over the earth. But unlike Olivine with is heavy and opaque, Peridot crystals are translucent and luminous! Peridot is one of the few gemstones that occur in only one color: a yellow green. Peridot is also the birth stone on August. Volcanic activity frequently forms Peridot, and it is often found inside Lava! However, Peridot crystals have also been found inside Meteorites