sedimentary
Jasper
Silicon dioxide (Microcrystalline quartz, SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth tones of red, brown, yellow, or green, conchoidal fracture with no cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth tones of red, brown, yellow, or green, conchoidal fracture with no cleavage.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks where silica-rich fluids precipitate in cavities during ancient geological periods.
Uses & applications
Widely used for lapidary work, ornamental carvings, decorative cabochons in jewelry, and collected by rockhounds.
Geological facts
Jasper has been used since ancient times to create seals, talismans, and decorative tools due to its durability and polishability.
Field identification & locations
Identified by its waxy luster, opaque nature, and lack of crystal faces; commonly found in riverbeds, hydrothermal veins, and sedimentary deposits worldwide.
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