sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness 6.5-7; olive to dark green color; waxy to dull luster; cryptocrystalline structure with conchoidal fracture.
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Physical properties
Mohs hardness 6.5-7; olive to dark green color; waxy to dull luster; cryptocrystalline structure with conchoidal fracture.
Formation & geological history
Forms via silica-rich precipitation in marine or hydrothermal environments, often dating from the Precambrian to Cenozoic eras.
Uses & applications
Used in ornamental carvings, cabochons, jewelry, and polished display specimens.
Geological facts
Green jasper was historically used by ancient civilizations for talismans, seals, and weaponry components due to its toughness.
Field identification & locations
Identified by its microcrystalline texture, lack of cleavage, and green coloration; commonly found in riverbeds and mountainous regions worldwide.
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