sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, earthy to vitreous luster, opaque red-brown color, and conchoidal fracture with no visible crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, earthy to vitreous luster, opaque red-brown color, and conchoidal fracture with no visible crystal structure.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks where silica-rich fluids replace organic material or fill cavities, often in ancient marine or hydrothermal environments.
Uses & applications
Widely used for ornamental carvings, polished cabochons, jewelry, and as a popular specimen for mineral collectors.
Geological facts
Jasper has been used since ancient times to create seals, talismans, and decorative tools due to its durability and rich color variations.
Field identification & locations
Identified easily in the field by its waxy luster, opaque reddish coloration, and hard conchoidal breaking pattern; found globally in weathered volcanic deposits and riverbeds.
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