sedimentary
Jasper
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque appearance, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque appearance, and conchoidal fracture.
Formation & geological history
Formed from silica-rich solutions precipitating in sedimentary environments or hydrothermal veins, often associated with volcanic ash.
Uses & applications
Used primarily for ornamental carvings, cabochons, jewelry, and decorative stone objects.
Geological facts
Jasper has been used since ancient times for seals, talismans, and weaponry due to its toughness and fracture characteristics.
Field identification & locations
Identify by its dense, opaque color patterns and lack of cleavage; commonly found worldwide in riverbeds and ancient volcanic deposits.
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