sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque yellow-brown color, waxy to dull luster, cryptocrystalline structure, conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque yellow-brown color, waxy to dull luster, cryptocrystalline structure, conchoidal fracture.
Formation & geological history
Formed from silica-rich fluids precipitating in sedimentary environments or volcanic cavities, often enriched with iron oxides.
Uses & applications
Used in ornamental carvings, jewelry, lapidary arts, and as a collector specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components across various civilizations.
Field identification & locations
Identified by its opaque appearance, smooth waterworn shape, and hardness that scratches glass; commonly found in riverbeds and desert varnish areas.
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