Genuine Peridot Princess-Cut Studs .925 Sterling Silver Bright & dainty Stone Size: Approx. 5mm New without tags. About Peridot: Peridot is a gem variety of the mineral Olivine, found in peridotite rock from the Earth’s upper mantle. Olivine also occurs in high-temperature metamorphic rocks, lunar basalts, and some meteorites. Olivine is an important group of rock-forming minerals typically named after members of the forsterite-fayalite solid-solution series. Its chemical composition includes iron and magnesium, and iron is responsible for its attractive yellowish-green color. This gem is still prized for its restful yellowish-green hues and long history. Historically used as a talisman against evil spirits and night terrors. It is also known to promote emotional healing and abundance.