sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, earthy to vitreous luster, opaque red-brown color, and conchoidal fracture without distinct cleavage.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, earthy to vitreous luster, opaque red-brown color, and conchoidal fracture without distinct cleavage.
Formation & geological history
Formed from silica-rich solutions precipitating in sedimentary environments or volcanic ash beds, often dating from Precambrian formations.
Uses & applications
Used primarily for ornamental carvings, cabochons, lapidary art, and as a collectible gemstone.
Geological facts
Red jasper gets its rich color from iron oxide inclusions and has been used since antiquity for talismans and seals.
Field identification & locations
Identified by its opaque appearance, waxy luster, and resistance to scratching by steel; commonly found in riverbeds and mountainous regions worldwide.
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