sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, trigonal crystal system, conchoidal fracture, and specific gravity around 2.65.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, trigonal crystal system, conchoidal fracture, and specific gravity around 2.65.
Formation & geological history
Formed through the silica-rich precipitation in marine sediments or volcanic ash, often during the Precambrian and Paleozoic eras.
Uses & applications
Commonly used in ornamental carvings, cabochons, jewelry, and as a popular specimen for rock tumbling and collecting.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry due to its toughness and ability to take a high polish.
Field identification & locations
Identified by its dense, opaque appearance and multicolored banding or patterns; widely found globally in riverbeds and mountainous regions.
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Fossiliferous Sedimentary Rock
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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