gemstone
Peridot
Olivine (Mg, Fe)2SiO4
Hardness of 6.5 to 7 on the Mohs scale, olive-green to yellow-green color, vitreous luster, orthorhombic crystal system, conchoidal fracture, specific gravity of 3.2 to 4.3.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, olive-green to yellow-green color, vitreous luster, orthorhombic crystal system, conchoidal fracture, specific gravity of 3.2 to 4.3.
Formation & geological history
Formed deep within the Earth's mantle under high temperatures and pressures, brought to the surface by tectonic activity or volcanic eruptions. Also found in certain pallasite meteorites.
Uses & applications
Used primarily as a faceted or cabochon gemstone in fine jewelry, such as rings, necklaces, and earrings.
Geological facts
Peridot is one of the few gemstones that occurs in only one color (green). Some peridot crystals have extraterrestrial origins, having arrived on Earth via meteorites.
Field identification & locations
Identified by its distinctive bottle-green or olive-green color and high double refraction. Commonly sourced from Arizona, Myanmar, Pakistan, and China.
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