sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness 6.5-7 on Mohs scale; opaque green color due to iron impurities; waxy to vitreous luster; trigonal crystal system with cryptocrystalline structure.
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Physical properties
Hardness 6.5-7 on Mohs scale; opaque green color due to iron impurities; waxy to vitreous luster; trigonal crystal system with cryptocrystalline structure.
Formation & geological history
Formed through the hydrothermal deposition of silica-rich fluids or chemical precipitation in marine environments, often dating back to the Precambrian era.
Uses & applications
Used primarily in lapidary arts, ornamental carvings, polished cabochons, and as a collector's mineral specimen.
Geological facts
Jasper has been used since ancient times for talismans and weaponry. Its dense microcrystalline structure allows it to take a high, lasting polish.
Field identification & locations
Found worldwide in riverbeds, marine deposits, and silicate veins. Identified by its conchoidal fracture, smooth water-worn surface, and inability to be scratched by steel.
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