sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, massive crystal structure, and a smooth tumbled texture with brown and reddish tones.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, massive crystal structure, and a smooth tumbled texture with brown and reddish tones.
Formation & geological history
Formed from silica-rich sediments or volcanic ash precipitated in marine environments, often dating back over 500 million years.
Uses & applications
Used primarily for ornamental carvings, tumbled stones, lapidary art, and jewelry making.
Geological facts
Jasper has been utilized by ancient civilizations since the 4th millennium BC for seals, drills, and amulets.
Field identification & locations
Easily identified by its opaque nature and microcrystalline fracture; found globally in riverbeds, sedimentary deposits, and volcanic regions.
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