sedimentary
Jasper
Silicon dioxide (Microcrystalline Quartz, SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, trigonal crystal system, conchoidal fracture, and specific gravity of 2.58 to 2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, trigonal crystal system, conchoidal fracture, and specific gravity of 2.58 to 2.91.
Formation & geological history
Formed by the precipitation of silica-rich fluids in sedimentary basins or volcanic environments over millions of years.
Uses & applications
Commonly used for ornamental carvings, polished cabochons in jewelry, and decorative landscaping stones.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components by various ancient civilizations.
Field identification & locations
Identified by its dense, opaque banding and smooth water-worn texture; commonly found in riverbeds and coastal gravels worldwide.
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