![661px-Gem peridot](https://fc15bf.p3cdn2.secureserver.net/news/wp-content/uploads/2013/07/661px-Gemperidot-300x272.jpg)
Peridot is a type of Olivine, a common mineral in mafic and ultramafic rocks. While Olivine is a generally abundant mineral, gem quality peridot is rather rare, and therefore is considered precious. Peridot crystals have been found in Pallasite meteorites. Peridot occurs in only one color, olive green.