sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque green color, waxy to vitreous luster, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque green color, waxy to vitreous luster, and conchoidal fracture.
Formation & geological history
Formed through the silification of clay-rich sediments or volcanic ash in marine environments, often dating from the Precambrian to Cenozoic eras.
Uses & applications
Used primarily for ornamental carvings, cabochons in jewelry, and as a collectible lapidary specimen.
Geological facts
Green jasper gets its distinctive coloration from iron impurities and chromium. It has been used for talismans and tools since ancient times.
Field identification & locations
Identify by its hardness, lack of cleavage, and smooth conchoidal breakage. Commonly found in riverbeds, hydrothermal veins, and sedimentary deposits worldwide.
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