gemstone

Likely rough yellow-green gemstone, possibly peridot

Peridot (gem-quality olivine), (Mg,Fe)₂SiO₄ — identification is uncertain from the photo

AI-generated identification · may be incorrect

Small, pale yellow-green, translucent-to-opaque piece with a granular or rough surface; olivine has Mohs hardness 6.5–7, vitreous luster, and orthorhombic crystals. The image does not show enough detail to confirm composition or cleavage.

Identified October 6, 2026More gemstone →

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Physical properties

Formation & geological history

If peridot, it crystallized in mafic or ultramafic igneous rock and may have been brought to the surface by basaltic magma; olivine formed throughout geologic time in Earth’s mantle and volcanic rocks.

Uses & applications

Peridot is cut for jewelry; rough pieces are also collected. If this is ordinary olivine-bearing rock rather than gem material, it has limited commercial value.

Geological facts

Peridot is the gem variety of olivine and is one of the few gemstones occurring in only one color family: green.

Field identification & locations

A clear, close-up view and tests such as hardness, refractive index, or mineral analysis are needed to distinguish peridot from other pale-green minerals. Olivine occurs in basalt and peridotite worldwide.