sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque green color, waxy to vitreous luster, and microcrystalline trigonal structure.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque green color, waxy to vitreous luster, and microcrystalline trigonal structure.
Formation & geological history
Formed from silica-rich precipitates or altered volcanic ash accumulating in sedimentary environments over millions of years.
Uses & applications
Widely used for cabochons, carved ornaments, tumbled stones, and lapidary art.
Geological facts
Green jasper has been used since ancient times for talismans and seals due to its durability and rich color.
Field identification & locations
Identify by its solid green color, conchoidal fracture, and inability to be scratched by a steel knife. Found globally in riverbeds and hydrothermal veins.
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