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 often featuring contrasting patterns or veins.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors often featuring contrasting patterns or veins.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, where silica-rich fluids precipitate quartz microcrystals in depositional environments over millions of years.
Uses & applications
Commonly used in ornamental carvings, cabochons, jewelry, and polished display specimens.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components like arrowheads due to its conchoidal fracture and durability.
Field identification & locations
Easily identified by its smooth, opaque appearance and hardness that scratches glass. Found worldwide in riverbeds, hydrothermal veins, and sedimentary deposits.
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