mineral

Red jasper

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

AI-generated identification · may be incorrect

Typically red to brick-red with black, cream, or brown patches; dull to vitreous luster, hardness about 6.5–7 Mohs, massive cryptocrystalline structure, no cleavage, and specific gravity around 2.6.

Identified August 20, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids cement or replace volcanic ash, sediments, or older rocks, with iron oxidation producing the red color. Deposits range from Precambrian to younger volcanic and sedimentary settings.

Uses & applications

Commonly cut and polished for cabochons, beads, carvings, ornaments, and lapidary objects; lesser-quality material is used decoratively and occasionally as aggregate.

Geological facts

Jasper is technically a rock rather than a single mineral, though quartz is its dominant component. Brecciated, orbicular, and scenic varieties are especially prized by collectors.

Field identification & locations

Identify it by its opaque red body, iron staining, dense feel, and inability to scratch with a steel knife easily; it commonly occurs in volcanic terrains and silica-rich sedimentary beds worldwide. The pictured piece appears tumbled or naturally rounded.