sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque luster, featuring red, brown, and yellow hues with a conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque luster, featuring red, brown, and yellow hues with a conchoidal fracture.
Formation & geological history
Formed from silica-rich sediments or volcanic ash, precipitated in marine environments and consolidated over millions of years.
Uses & applications
Used widely in ornamental carvings, cabochons, jewelry, and as a polished collector specimen.
Geological facts
Jasper has been used since ancient times for talismans and seals, prized by civilizations like the Minoans and Egyptians.
Field identification & locations
Identified by its opaque appearance, waxy luster, and inability to be scratched by a steel knife. Found globally in riverbeds and mountainous regions.
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