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 including red and brown, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors including red and brown, and conchoidal fracture.
Formation & geological history
Formed through the silification of sediment or volcanic ash, often in marine environments, with mineral-rich silica solutions replacing original materials over geological time scales.
Uses & applications
Used in ornamental carvings, cabochons, jewelry, and as a popular specimen for mineral collectors.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components due to its toughness and ability to take a high polish.
Field identification & locations
Identify in the field by its waxy luster, hardness that scratches glass, and opaque earthy coloration. Commonly found in riverbeds, hydrothermal veins, and sedimentary deposits worldwide.
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