gemstone

Yellow-green faceted gemstone (possibly peridot)

Undetermined; peridot is gem-quality olivine, (Mg,Fe)₂SiO₄

AI-generated identification · may be incorrect

The image shows a yellow-green transparent cabochon set in a metal ring; the stone’s hardness, crystal structure, and identity cannot be confirmed visually. Peridot, if genuine, has Mohs hardness 6.5–7, glassy luster, and an orthorhombic crystal structure.

Identified September 26, 2026More gemstone →

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Physical properties

Formation & geological history

If peridot, it forms in magnesium-rich igneous rocks and some mantle-derived volcanic deposits; olivine is geologically ancient, though individual crystals vary in age. Other gems or glass can look similar in a photograph.

Uses & applications

Used primarily in jewelry; the setting appears to be a silver-colored metal, but its composition is not identifiable from the image.

Geological facts

Color and appearance alone cannot distinguish peridot from other gems, simulants, or glass; gemological testing is needed for a reliable identification.

Field identification & locations

A jeweler or gemologist can test refractive index, inclusions, and composition. Peridot occurs in volcanic rocks and mantle-derived deposits, including locations in Arizona, Pakistan, and Myanmar.