sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

AI-generated identification · may be incorrect

Mohs hardness of 6.5 to 7. Color ranges from brick red to brownish-red with occasional webbed veins. Exhibits a vitreous to dull luster and a microcrystalline quartz structure with conchoidal fracture.

Identified November 12, 2026More sedimentary →

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Physical properties

Formation & geological history

Forms through the precipitation of silica from thermal or marine waters, often enriched with iron oxide pigments, in sedimentary environments.

Uses & applications

Widely used for ornamental carvings, polished tumbling stones, cabochons in jewelry, and decorative objects.

Geological facts

Ancient cultures frequently used red jasper as a protective amulet and carved it into seals due to its durability and rich color.

Field identification & locations

Identified by its opaque red coloration, microcrystalline texture, and hardness that easily scratches glass. Found globally, especially in India, Brazil, Russia, and the USA.