sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors, and conchoidal fracture with no visible crystal structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors, and conchoidal fracture with no visible crystal structure.
Formation & geological history
Formed from silica-rich fluids precipitating in sedimentary environments or volcanic fissures, often during the Precambrian to Paleozoic eras.
Uses & applications
Used extensively for ornamental carvings, cabochons in jewelry, polished specimens, and landscaping decorative stone.
Geological facts
Jasper has been utilized by ancient humans since the 4th and 5th millennia BC for making bows, drills, and ritual ornaments.
Field identification & locations
Easily identified in the field by its waxy luster, opaque appearance, and inability to be scratched by steel.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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