Collection: Peridot
Peridot can be found in mafic and ultramafic rocks occurring in lava and peridotite xenoliths of the mantle. The gem occurs in silica-deficient rocks such as volcanic basalt and pallasiticmeteorites. Peridot is one of only two gems observed to be formed not in Earth's crust, but in the molten rock of the upper mantle.[1] Gem-quality peridot is rare on Earth's surface due to its susceptibility to alteration during its movement from deep within the mantle and weathering at the surface.[2] Peridot has a chemical formula of (Mg,Fe)2SiO4.
Peridot is one of the birthstones for the month of August.[3]