sedimentary

Jasper

Microcrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness of 6.5 to 7 on the Mohs scale, with a vitreous to dull luster and opaque appearance. It occurs in various earthy colors including red, brown, yellow, and green due to iron oxide impurities.

Identified October 22, 2026More sedimentary →

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, with a vitreous to dull luster and opaque appearance. It occurs in various earthy colors including red, brown, yellow, and green due to iron oxide impurities.

Formation & geological history

Forms through the precipitation of silica from aqueous solutions in sedimentary environments or hydrothermal veins. It often develops within cracks and cavities of pre-existing rocks over millions of years.

Uses & applications

Commonly used for ornamental carvings, cabochons, jewelry, and polished decorative objects. It has also been utilized since prehistoric times for creating stone tools and arrowheads.

Geological facts

Jasper is an ancient gemstone mentioned in various historical and biblical texts for its protective properties. It is a variety of chalcedony that typically contains up to twenty percent foreign materials.

Field identification & locations

Identified easily by its conchoidal fracture and opaque, multicolored patterns. It is globally distributed and frequently found in riverbeds, volcanic regions, and sedimentary deposits.