mineral

Polished red jasper beads

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides

AI-generated identification · may be incorrect

Typically opaque brick-red to reddish-brown with black, gray, or cream mottling; waxy to glassy luster when polished. Mohs hardness 6.5–7, no cleavage, cryptocrystalline quartz structure, and specific gravity about 2.5–2.7.

Identified August 8, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids replace or cement volcanic ash, sediments, or other rock, with iron oxides producing the red color. Deposits occur in many ages, commonly in volcanic and sedimentary environments.

Uses & applications

Used for beads, cabochons, carvings, ornaments, and lapidary objects; polished stone is also sold for decorative and metaphysical purposes.

Geological facts

Jasper is a variety of chalcedony or microcrystalline quartz, though the term is often used broadly for opaque silica-rich rocks. Patterns and color intensity vary greatly between deposits.

Field identification & locations

Identify it by its opaque red coloration, iron-rich mottling, smooth polish, and inability to scratch with a steel knife easily; glass may be scratched by jasper. Common sources include India, Madagascar, Brazil, Australia, Mexico, and the United States.