gemstone

Faceted peridot

Olivine, typically the forsterite–fayalite series; (Mg,Fe)₂SiO₄

AI-generated identification · may be incorrect

Hardness 6.5–7 Mohs; yellow-green to olive-green, vitreous luster, orthorhombic crystal structure, and no distinct cleavage. The image shows a small oval-cut transparent green gemstone; exact identity cannot be confirmed from appearance alone.

Identified October 11, 2026More gemstone →

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Physical properties

Formation & geological history

Peridot forms in magnesium-rich igneous rocks and is also found in some meteorites. Its crystals may originate deep in Earth’s mantle and be brought upward by volcanic activity; ages vary by deposit.

Uses & applications

Used primarily in jewelry, including faceted stones and beads; also collected as a mineral specimen.

Geological facts

Peridot is the gem-quality variety of olivine and has been prized since antiquity.

Field identification & locations

Look for its characteristic lively yellow-green color and double refraction, which can make facet edges appear doubled. Major sources include Pakistan, Myanmar, China, Arizona, and volcanic islands.