sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, trigonal crystal system, conchoidal fracture, and specific gravity around 2.65.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, trigonal crystal system, conchoidal fracture, and specific gravity around 2.65.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, often precipitating from silica-rich hydrothermal solutions or seawater during ancient geological periods.
Uses & applications
Used primarily in ornamental carvings, jewelry, lapidary arts, and as a collectible decorative stone.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry like arrowheads due to its durability and smooth fracture.
Field identification & locations
Identified by its dense, opaque appearance and distinct multicolored banding or spotting; found worldwide in riverbeds, ancient marine deposits, and volcanic regions.
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