sedimentary
Jasper and Chalcedony
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure with conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure with conchoidal fracture.
Formation & geological history
Formed through the deposition of silica-rich fluids in rock cavities or sedimentary basins, often occurring in hydrothermal veins or volcanic environments.
Uses & applications
Commonly used for ornamental carvings, cabochons, jewelry making, and lapidary art.
Geological facts
Jasper is an opaque variety of chalcedony, frequently colored red, brown, or yellow by iron oxide impurities.
Field identification & locations
Identified by its waxy luster, conchoidal fracture, and inability to be scratched by a steel knife. Found worldwide in riverbeds and volcanic rock deposits.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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