sedimentary

Red Jasper

SiO2 (Microcrystalline Quartz)

Hardness of 6.5 to 7 on the Mohs scale, opaque brick-red color due to iron oxide inclusions, vitreous to dull luster, microcrystalline or cryptocrystalline crystal structure, conchoidal fracture with no cleavage, and a specific gravity around 2.58 to 2.91.

Identified July 30, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed via the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins, often incorporating iron oxide impurities during deposition. It typically forms within ancient ocean basins or volcanic environments over millions of years.

Uses & applications

Widely used for tumbled decorative stones, cabochons in jewelry, carvings, ornamental objects, and as a popular specimen for mineral collectors.

Geological facts

Red jasper has been used since ancient times for talismans, seals, and weaponry components like arrowheads due to its toughness and ability to take a high polish. Its distinctive red hue is entirely natural, caused by microscopic iron oxide inclusions within the quartz matrix.

Field identification & locations

Can be identified by its opaque red color, waxy-to-vitreous luster, and high hardness (scratches glass but cannot be scratched by a steel knife). It is found worldwide, with significant deposits in India, Brazil, Russia, France, Germany, and the United States.