gemstone

Polished red jasper (possibly carnelian/chalcedony)

Jasper, an opaque microcrystalline variety of quartz (SiO₂); exact identification is uncertain from the image

AI-generated identification · may be incorrect

The smooth, glossy, reddish-brown tumbled stone appears opaque. Quartz has Mohs hardness 7, trigonal crystal structure, and no cleavage; specific gravity is about 2.6.

Identified September 27, 2026More gemstone →

Explore Polished red jasper (possibly carnelian/chalcedony) in the encyclopedia →

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Physical properties

The smooth, glossy, reddish-brown tumbled stone appears opaque. Quartz has Mohs hardness 7, trigonal crystal structure, and no cleavage; specific gravity is about 2.6.

Formation & geological history

Silica-rich fluids fill cavities and replace or cement material in volcanic and sedimentary rocks; iron oxides give jasper its red color. Such deposits form across many geological ages.

Uses & applications

Polished stones are used in jewelry, beads, ornaments, and collections.

Geological facts

Jasper is chalcedony rendered opaque by mineral inclusions; a translucent specimen would be more consistent with carnelian.

Field identification & locations

Look for a waxy-to-glassy polish, uniform or mottled red color, and hardness sufficient to scratch glass; common sources include India, Brazil, and the western United States. The photo does not show enough detail to distinguish jasper confidently from other red stones.