mineral

Peridot

Olivine ((Mg, Fe)2SiO4)

Hardness: 6.5-7 (Mohs scale). Color: Olive-green, lime-green, to yellowish-green. Luster: Vitreous/Glassy. Crystal Structure: Orthorhombic. Specific Gravity: 3.2-4.3. High double refraction.

Hardness: 6
Color: Olive-green, lime-green, to yellowish-green
Luster: Vitreous/Glassy

Identified March 13, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale). Color: Olive-green, lime-green, to yellowish-green. Luster: Vitreous/Glassy. Crystal Structure: Orthorhombic. Specific Gravity: 3.2-4.3. High double refraction.

Formation & geological history

Formed deep in the Earth's mantle and brought to the surface by volcanic activity; occasionally found in Pallasite meteorites. Primarily forms in mafic and ultramafic igneous rocks like basalt.

Uses & applications

Primarily used as a gemstone in jewelry (rings, necklaces). Also of significant interest to mineral collectors and geologists studying mantle composition.

Geological facts

Known as the 'Evening Emerald' due to its ability to glow green under artificial light. It is one of the few gemstones that occurs in only one color. Specimens have been found in stardust from robotic space probes and comet debris.

Field identification & locations

Identify by its distinctive oily luster and 'olive' green hue that does not change under different light sources. Commonly found in Arizona (USA), Pakistan, Myanmar, and Zabargad Island. Collectors look for high clarity and deep saturation.