mineral

Red jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony (SiO₂), iron-oxide stained

AI-generated identification · may be incorrect

Opaque brick-red to rusty brown with white chalcedony/quartz patches and darker cavities; dull to subtly vitreous luster, massive structure, no visible cleavage, and Mohs hardness about 6.5–7. Specific gravity is typically 2.5–2.7.

Identified September 13, 2026More mineral →

Explore Red jasper (likely brecciated jasper) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms when silica-rich fluids replace or cement volcanic, sedimentary, or hydrothermal breccia, with hematite/goethite producing the red color. Individual jasper bodies may range from Precambrian to much younger; the specimen’s age cannot be determined from the image.

Uses & applications

Used as ornamental stone, cabochons, beads, carvings, tumbling material, and decorative aggregate; attractive pieces have modest lapidary value.

Geological facts

The red coloration comes mainly from finely disseminated iron oxides rather than native metallic iron. White areas are likely quartz or chalcedony, and the angular textures suggest brecciation or vein filling.

Field identification & locations

Identify by its opaque red body, very fine texture, quartz-like hardness, and inability to scratch with a steel knife easily; it commonly occurs in volcanic and hydrothermal terrains worldwide, including India, Madagascar, Brazil, and the western United States.