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-tone colors including brown and green, cryptocrystalline structure, conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors including brown and green, cryptocrystalline structure, conchoidal fracture.
Formation & geological history
Formed by the precipitation of silica-rich fluids in sedimentary environments or volcanic ash beds, often dating back millions of years.
Uses & applications
Used in lapidary arts for making cabochons, beads, decorative carvings, and as a popular specimen for rock collectors.
Geological facts
Jasper has been used since ancient times for amulets, seals, and weaponry. Certain varieties contain mineral inclusions that create striking landscape patterns.
Field identification & locations
Identified by its opaque appearance, waxy luster, and lack of cleavage. Commonly found in riverbeds and mountainous regions worldwide.
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