sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earthy colors due to iron impurities, and a conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earthy colors due to iron impurities, and a conchoidal fracture.
Formation & geological history
Formed through the silification of sedimentary deposits or volcanic ash, typically in silica-rich aqueous environments over millions of years.
Uses & applications
Used primarily for ornamental carvings, polished cabochons in jewelry, and decorative stone items.
Geological facts
Jasper has been used since ancient times to create seals, talismans, and intricate weaponry.
Field identification & locations
Identify by its fine-grained texture, waxy luster, and inability to be scratched by a steel knife.
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