sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth tones including brown, red, and yellow, with a conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth tones including brown, red, and yellow, with a conchoidal fracture.
Formation & geological history
Formed from silica-rich solutions precipitating in marine environments or volcanic ash beds, often during the Precambrian to Cenozoic eras.
Uses & applications
Used primarily for ornamental carvings, cabochons, jewelry, and as a collectible lapidary material.
Geological facts
Jasper has been utilized since ancient times for talismans, seals, and weaponry like arrowheads due to its toughness and ability to take a high polish.
Field identification & locations
Identified by its waxy luster, lack of cleavage, and opaque earthy colors. Found globally in weathering zones and river gravels.
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