sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque transparency, concoidal fracture, colors range from red, brown, yellow to green due to iron and other mineral impurities.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque transparency, concoidal fracture, colors range from red, brown, yellow to green due to iron and other mineral impurities.
Formation & geological history
Formed through the deposition of silica-rich fluids or sediments in marine environments or hydrothermal veins, often occurring during volcanic activity and subsequently undergoing diagenesis.
Uses & applications
Used for ornamental objects, cabochons, jewelry, carvings, and sometimes in industry as an abrasive.
Geological facts
Jasper has been used since ancient times to create seals, talismans, and jewelry, with mentions dating back to Mesopotamian and Greek civilizations.
Field identification & locations
Found worldwide in sedimentary and volcanic rock formations; identified by its opaque nature, hardness, and lack of cleavage.
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