sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various colors due to impurities, conchoidal fracture with no cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various colors due to impurities, conchoidal fracture with no cleavage.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, precipitating from silica-rich fluids in marine or hydrothermal environments.
Uses & applications
Used widely in ornamental carvings, cabochons, jewelry, and as a decorative display specimen for collectors.
Geological facts
Jasper has been used since ancient times for seals, talismans, and tools, often mentioned in Greek and Roman lapidary texts.
Field identification & locations
Identify by its waxy luster, opaque nature, and inability to be scratched by a steel knife; commonly found globally in riverbeds and mountainous regions.
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