mineral

Polished red jasper (likely brecciated or iron-rich jasper)

Jasper, microcrystalline quartz/chalcedony (SiO₂) with iron-oxide impurities

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque reddish-brown with cream inclusions, waxy to glassy luster, very fine-grained, and no visible cleavage. Specific gravity is typically 2.5–2.7.

Identified August 26, 2026More mineral →

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Physical properties

Hardness about 6.5–7 Mohs; opaque reddish-brown with cream inclusions, waxy to glassy luster, very fine-grained, and no visible cleavage. Specific gravity is typically 2.5–2.7.

Formation & geological history

Forms when silica-rich fluids cement or replace sediments and volcanic material, with iron oxides producing the red color; deposits range from Precambrian to much younger ages. This specimen is tumbled or polished.

Uses & applications

Used for cabochons, beads, carvings, worry stones, and decorative objects; occasionally used as a minor ornamental stone. Common polished pieces typically have modest market value.

Geological facts

Jasper is a variety of opaque chalcedony, and its patterns arise from impurities, brecciation, or fluid movement during silicification. The image may also represent red aventurine or another dyed/polished silica stone, which cannot be confirmed visually alone.

Field identification & locations

Identify by its opaque red body, cream or brown patterning, quartz-like hardness, and lack of cleavage; it should scratch glass but not be scratched by a steel knife. Common sources include India, Madagascar, Brazil, Australia, and the western United States.