sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness 6.5-7 on Mohs scale; colors range from red, brown, yellow to green; opaque luster; trigonal crystal system with no cleavage.
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Physical properties
Hardness 6.5-7 on Mohs scale; colors range from red, brown, yellow to green; opaque luster; trigonal crystal system with no cleavage.
Formation & geological history
Formed from silica-rich fluids precipitating in sedimentary environments or hydrothermal veins, often associated with volcanic activity.
Uses & applications
Used primarily for ornamental carvings, polished decorative stones, and low-cost jewelry.
Geological facts
Jasper has been utilized since ancient times for talismans, seals, and tools due to its toughness and ability to take a high polish.
Field identification & locations
Identify by its conchoidal fracture, waxy luster, opacity, and distinctive earthy color patterns. Found worldwide in riverbeds and ancient marine deposits.
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