mineral

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5 to 7 on the Mohs scale; Color: Red, brown, yellow, green, or multicolored; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline/cryptocrystalline); Cleavage: None, exhibits conchoidal fracture; Specific gravity: 2.58 to 2.91

Hardness: 6
Color: Red, brown, yellow, green, or multicolored
Luster: Vitreous to dull

Identified August 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich fluids in sedimentary or volcanic environments, often replacing organic material or filling fractures over millions of years.

Uses & applications

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

Geological facts

Jasper has been used since ancient times to create seals, talismans, and decorative items. Its name comes from the Greek word iaspe, meaning 'spotted stone.'

Field identification & locations

Can be identified in the field by its opaque appearance, waxy to dull luster, conchoidal fracture, and inability to be scratched by a steel knife. Found worldwide in riverbeds, sedimentary deposits, and volcanic rock cavities.