Perdiot

Peridot (sometimes called chrysolite) is
gem-quality olivine and a silicate mineral with the formula of (Mg, Fe)2SiO4. As peridot is a
magnesium-rich variety of olivine (forsterite), the formula approaches Mg2SiO4. Peridot is one of
the few gemstones that occur in only one color:
an olive-green. Peridot crystals have been
collected from some pallasite meteorites.