sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors due to mineral impurities, trigonal crystal system with no cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors due to mineral impurities, trigonal crystal system with no cleavage.
Formation & geological history
Formed through the precipitation of silica-rich fluids in sedimentary basins or volcanic environments, often dating back hundreds of millions of years.
Uses & applications
Commonly used in cabochons, ornamental carvings, jewelry, and as a popular specimen for rock collectors.
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
Identify by its waxy luster, conchoidal fracture, opacity, and hardness that easily scratches glass; found worldwide in riverbeds and mountainous regions.
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Sandstone or Siltstone
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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