gemstone

Polished green jasper (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂); exact variety cannot be confirmed from the photo

AI-generated identification · may be incorrect

Opaque olive-green stone with mottled brown and dark inclusions and a glossy tumbled finish. Quartz hardness is about 6.5–7 Mohs; massive, microcrystalline texture, with no visible cleavage and a typical specific gravity near 2.6.

Identified October 16, 2026More gemstone →

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Physical properties

Formation & geological history

Jasper forms as silica-rich fluids fill cavities or replace sediments and volcanic material, with iron and other impurities producing its colors. It occurs in rocks of many geological ages.

Uses & applications

Used for beads, cabochons, ornaments, and inexpensive lapidary pieces; generally not used as a major construction material.

Geological facts

“Jasper” describes an opaque, impurity-rich variety of chalcedony rather than one uniquely defined mineral species.

Field identification & locations

Green color and opacity fit jasper, but visual identification alone cannot distinguish it reliably from other green stones. Jasper is found worldwide; a scratch test or mineral analysis can help confirm identity.