sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, earthy to waxy appearance, and conchoidal fracture without distinct cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, earthy to waxy appearance, and conchoidal fracture without distinct cleavage.
Formation & geological history
Formed by the precipitation of silica-rich fluids in sedimentary environments or volcanic ash beds, often dating from the Precambrian to Cenozoic eras.
Uses & applications
Widely used in ornamental carvings, cabochons, jewelry making, and lapidary art.
Geological facts
Jasper has been utilized since ancient times for talismans, seals, and weaponry components due to its toughness and ability to take a high polish.
Field identification & locations
Identified by its opacity, varied earth-tone banding, and hardness that scratches glass; commonly found in riverbeds and mountainous regions worldwide.
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