sedimentary

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness of 6.5 to 7 on the Mohs scale, opaque red to brownish-red color due to iron impurities, waxy to dull luster, trigonal crystal system with cryptocrystalline structure, conchoidal fracture, specific gravity around 2.58 to 2.91

Identified August 7, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed via the precipitation of silica-rich fluids in marine or hydrothermal environments, often replacing organic material or filling fractures in existing rocks. Geological age varies widely from Precambrian to Cenozoic.

Uses & applications

Used in ornamental carvings, cabochons, polished decorative stones, jewelry making, and as a popular specimen for mineral collectors.

Geological facts

Red jasper has been used since ancient times for amulets, seals, and weaponry components. Its deep red color comes from iron oxide (hematite) inclusions within the microcrystalline quartz matrix.

Field identification & locations

Can be identified in the field by its opaque red color, hardness that scratches glass, waxy luster, and conchoidal fracture. Found worldwide in regions with significant hydrothermal or sedimentary silica deposition.