sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Hardness of 7 on the Mohs scale, typically brown, yellow, red, or green due to iron oxide impurities, waxy to dull luster, cryptocrystalline structure with conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, typically brown, yellow, red, or green due to iron oxide impurities, waxy to dull luster, cryptocrystalline structure with conchoidal fracture.
Formation & geological history
Formed through the deposition of silica-rich fluids or silty sediments in marine or terrestrial environments, often altered by low-grade metamorphism or diagenesis over millions of years.
Uses & applications
Used for ornamental carvings, polished stones, lapidary art, jewelry, and as a collector specimen.
Geological facts
Jasper has been used since ancient times to create seals, talismans, and jewelry, with mentions dating back to antiquity across various civilizations.
Field identification & locations
Found worldwide in riverbeds, glacial drift, and sedimentary or volcanic rock formations; identified by its opaque nature, hardness, and smooth conchoidal fracture.
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