sedimentary
Jasper
Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, microcrystalline quartz structure, and displays variegated colors including yellow, brown, and gray banding.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, microcrystalline quartz structure, and displays variegated colors including yellow, brown, and gray banding.
Formation & geological history
Formed from silica-rich sediments or volcanic ash precipitating in marine or terrestrial environments over millions of years.
Uses & applications
Commonly used for ornamental carvings, polished cabochons in jewelry, and as a collector specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry due to its toughness and ability to take a high polish.
Field identification & locations
Identified by its opaque nature, conchoidal fracture, and multi-colored banding; found globally in riverbeds and ancient sedimentary deposits.
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