Peridot, additionally called olivine, is a gemstone with the chemical composition (Mg, Fe)2SiO4. It belongs to the olivine mineral group and consists of magnesium, iron, silicon, and oxygen. The specific composition can vary, with extraordinary quantities of magnesium and iron gift within the crystal shape, main to versions in colour. Peridot is usually inexperienced in shade and is one of the few gemstones that occur in handiest one color.