mineral

Red jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

AI-generated identification · may be incorrect

Typically opaque brick-red with gray or brown matrix, waxy to dull luster, and irregular patterns; Mohs hardness about 6.5–7, no visible cleavage, conchoidal fracture, and specific gravity near 2.6. The specimen appears naturally rough and iron-stained.

Identified August 10, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids fill fractures or replace volcanic and sedimentary rocks, with hematite/goethite producing the red color. Jasper deposits range from Precambrian to Cenozoic and commonly occur in volcanic terrains.

Uses & applications

Used for cabochons, beads, carvings, lapidary pieces, and ornamental stone; occasionally used as a minor decorative aggregate. Common rough specimens have modest collector value.

Geological facts

Jasper is a variety of opaque chalcedony/microcrystalline quartz rather than a separate mineral species. Red coloration generally indicates disseminated hematite or related iron oxides.

Field identification & locations

Identify it by its opaque red coloration, hardness, fine-grained texture, and inability to scratch with a steel knife easily; a streak test is usually pale red to brown. Common worldwide, especially in volcanic and iron-rich regions.