sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque brown or multicolored appearance, waxy luster, trigonal crystal system, and conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque brown or multicolored appearance, waxy luster, trigonal crystal system, and conchoidal fracture.
Formation & geological history
Formed from silicon dioxide-rich silica deposits in marine or hydrothermal environments, often dating back to Precambrian times.
Uses & applications
Widely used for ornamental carvings, polished cabochons in jewelry, and decorative stone collecting.
Geological facts
Jasper is an aggregate of microgranular quartz and up to 20% foreign materials, which account for its rich colors and patterns.
Field identification & locations
Identifiable by its smooth opaque finish, lack of cleavage, and high scratch resistance; commonly found in riverbeds and mountainous regions worldwide.
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