sedimentary

Red Jasper

Microcrystalline quartz (SiO2) with iron oxide impurities

AI-generated identification · may be incorrect

Hardness of 6.5-7 on the Mohs scale, opaque red to reddish-brown color, waxy to vitreous luster, trigonal crystal system with microcrystalline structure, and specific gravity around 2.65.

Identified November 7, 2026More sedimentary →

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Physical properties

Hardness of 6.5-7 on the Mohs scale, opaque red to reddish-brown color, waxy to vitreous luster, trigonal crystal system with microcrystalline structure, and specific gravity around 2.65.

Formation & geological history

Formed from silica-rich sediments or volcanic ash accumulating on ocean floors, later compressed and cemented alongside iron oxides over hundreds of millions of years.

Uses & applications

Widely used in ornamental carvings, polished cabochons for jewelry, decorative tiles, and by mineral collectors.

Geological facts

Red jasper has been utilized since ancient times for talismans and seals. Its deep red hue is primarily caused by hematite inclusions.

Field identification & locations

Identified easily by its opaque red color, hardness exceeding glass, and conchoidal fracture. Found worldwide, notably in India, Brazil, Russia, and the USA.