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 often banded or patterned with red from iron oxides, and a trigonal crystal system.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earthy colors often banded or patterned with red from iron oxides, and a trigonal crystal system.
Formation & geological history
Forms from the precipitation of silica-rich fluids in sedimentary basins or volcanic environments, often dating back hundreds of millions of years.
Uses & applications
Commonly used for ornamental carvings, cabochons, jewelry, and polished collector specimens.
Geological facts
Jasper has been utilized by ancient civilizations since prehistoric times for tools, seals, and decorative ornaments.
Field identification & locations
Identify it in the field by its opacity, conchoidal fracture, and smooth waxy luster; found globally in riverbeds and mountainous regions.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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