Peridot

Physical Properties

Hardness: 6.5-7 on Mohs scale; Color: Yellow-green, olive-green, to brownish-green; Luster: Vitreous; Crystal structure: Orthorhombic; Specific gravity: 3.27-3.37

Formation & Geological History

Formed deep within the Earth's mantle and brought to the surface by volcanic activity. Also found in pallasite meteorites.

Uses & Applications

Primarily used as a gemstone in jewelry, especially as the birthstone for August.

Geological Facts

Peridot is one of the few gemstones that occurs in only one color: an olive-green. The intensity and tint of the green depend on the percentage of iron in the crystal structure.

Field Identification & Locations

Identified by its distinctive yellow-green color and strong double refraction. Common locations include the San Carlos Reservation in Arizona, Pakistan, Myanmar, and China.

Identified on: 4/27/2026

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