sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness 6.5-7 on the Mohs scale, earthy to waxy luster, opaque red-brown color with conchoidal fracture, trigonal crystal system.
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Physical properties
Hardness 6.5-7 on the Mohs scale, earthy to waxy luster, opaque red-brown color with conchoidal fracture, trigonal crystal system.
Formation & geological history
Forms from the silica-rich precipitation in marine environments or hydrothermal solutions, often dating from the Precambrian era.
Uses & applications
Used primarily in ornamental carvings, jewelry, lapidary arts, and as a decorative stone.
Geological facts
Jasper has been used since ancient times for talismans and seals, prized for its rich earth tones and toughness.
Field identification & locations
Identify by its lack of cleavage, waxy luster, and opaque reddish coloration; found worldwide in sedimentary and volcanic deposits.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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