sedimentary
Green Jasper
Microcrystalline quartz, SiO2
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7; olive to dark green color; waxy luster; trigonal crystal system; opaque with conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7; olive to dark green color; waxy luster; trigonal crystal system; opaque with conchoidal fracture.
Formation & geological history
Forms through the deposition of silica-rich fluids in sedimentary basins or volcanic environments over millions of years.
Uses & applications
Used primarily in lapidary work, decorative carvings, cabochons, and as a collector mineral.
Geological facts
Green jasper has been used since ancient times for talismans, seals, and weaponry components due to its toughness.
Field identification & locations
Identified in the field by its hardness, smooth water-worn pebble shape, and distinct opaque green coloration; commonly found in riverbeds and stream gravels worldwide.
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