sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque luster, various earth tones including brown, red, and yellow, with conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque luster, various earth tones including brown, red, and yellow, with conchoidal fracture.
Formation & geological history
Formed from silica-rich fluids precipitating in sedimentary environments or volcanic cavities, often over millions of years.
Uses & applications
Commonly used for ornamental carvings, polished cabochons, lapidary art, and collection.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry like arrowheads due to its toughness.
Field identification & locations
Identified by its waxy luster, opacity, and smooth weathered surfaces; found worldwide in riverbeds and mountainous regions.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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