sedimentary
Jasper
Silicon Dioxide (SiO2), microcrystalline quartz
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7; opaque; vitreous to dull luster; trigonal crystal system; conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7; opaque; vitreous to dull luster; trigonal crystal system; conchoidal fracture.
Formation & geological history
Formed through the silica-rich precipitation in marine sediments or volcanic ash, often associated with hydrothermal activity over geological ages.
Uses & applications
Widely used for ornamental carvings, cabochons, polished display pieces, and lapidary art.
Geological facts
Jasper has been utilized since ancient times for talismans, seals, and weaponry components like arrowheads due to its toughness.
Field identification & locations
Identified by its opaque appearance, smooth waxy polish, and varied multicolored bands or patterns; commonly found in riverbeds and mountainous regions worldwide.
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