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; brick-red to reddish brown, opaque, vitreous to waxy luster, cryptocrystalline structure, no visible cleavage, specific gravity about 2.6.

Identified August 23, 2026More mineral →

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Physical properties

Typically Mohs 6.5–7; brick-red to reddish brown, opaque, vitreous to waxy luster, cryptocrystalline structure, no visible cleavage, specific gravity about 2.6.

Formation & geological history

Forms when silica-rich fluids replace or cement sediment and volcanic material, with iron staining producing the red color; specimens may range from ancient Precambrian to younger deposits.

Uses & applications

Used for cabochons, beads, carvings, polished stones, and ornamental objects; this small shaped piece has modest decorative value.

Geological facts

Jasper is technically a rock composed largely of quartz rather than a single crystal mineral. Its color and patterns vary widely with iron content and impurities.

Field identification & locations

Identify it by its opaque red color, smooth polish, glassy-to-waxy surface, and inability to scratch it with a steel knife; common sources include Brazil, India, Madagascar, South Africa, and the western United States.