mineral

Red jasper

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

AI-generated identification · may be incorrect

Typically hardness 6.5–7 Mohs, opaque brick-red to burgundy with gray-white veining, vitreous to waxy luster, and no visible cleavage; specific gravity about 2.5–2.7. The specimen appears naturally rounded or roughly tumbled and polished by wear.

Identified August 14, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids replace or cement sediments, commonly in volcanic or hydrothermal environments; its age varies widely from Precambrian to recent. Iron minerals produce the red coloration.

Uses & applications

Used for cabochons, beads, carvings, polished stones, decorative objects, and inexpensive lapidary material; occasionally used as ornamental stone.

Geological facts

Jasper is technically a rock composed largely of microcrystalline quartz rather than a single pure mineral. Patterns and color intensity depend on iron-oxide content and included minerals.

Field identification & locations

Identify it by its opaque red body, high hardness, absence of cleavage, and inability to scratch with a steel knife easily; a streak test may show white to pale red. Common worldwide, including India, Brazil, Madagascar, Australia, and the United States.