sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque luster, various earth-tone colors, and a conchoidal fracture with no visible crystal structure.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque luster, various earth-tone colors, and a conchoidal fracture with no visible crystal structure.
Formation & geological history
Formed from silica-rich fluids precipitating in sedimentary environments or volcanic rocks, often millions of years old.
Uses & applications
Used in ornamental carvings, cabochons, jewelry making, and lapidary art collections.
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 opacity, smooth waxy polish, and distinct color banding or patterning; commonly found in riverbeds and mountainous regions.
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Fossiliferous Sedimentary Rock
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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