sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, variable colors including red, brown, and green, with a conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, variable colors including red, brown, and green, with a conchoidal fracture.
Formation & geological history
Formed through the accumulation of silica-rich sediments or silica-bearing solutions in marine environments, often associated with hydrothermal activity or volcanic ash.
Uses & applications
Used primarily for ornamental carvings, cabochons, jewelry, and as a collector specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components due to its toughness and fracture properties.
Field identification & locations
Found worldwide in riverbeds and mountainous regions; identified by its opaque nature, high hardness, and smooth waterworn surfaces in field settings.
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