mineral

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

AI-generated identification · may be incorrect

Typically Mohs 6.5–7; opaque brick-red to brown with dark mottling and a vitreous-to-waxy polish. Microcrystalline quartz; no visible cleavage. The image alone cannot confirm the exact variety.

Identified October 16, 2026More mineral →

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Physical properties

Typically Mohs 6.5–7; opaque brick-red to brown with dark mottling and a vitreous-to-waxy polish. Microcrystalline quartz; no visible cleavage. The image alone cannot confirm the exact variety.

Formation & geological history

Forms when silica-rich fluids or sediment cement are colored by iron oxides; jasper occurs in many geological ages and settings, including volcanic rocks and iron-rich sediments.

Uses & applications

Used for beads, cabochons, carvings, and decorative objects; it has little major industrial use.

Geological facts

Jasper is a trade term for opaque, patterned chalcedony rather than a single strictly defined mineral species.

Field identification & locations

The reddish color, opacity, and mottled pattern are consistent with jasper; hardness and a fine-grained texture help distinguish it from softer red stones. Found worldwide, including India, Brazil, Australia, and the western United States.