sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, variable colors featuring green and brown, waxy to dull luster, and cryptocrystalline structure with no visible cleavage.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, variable colors featuring green and brown, waxy to dull luster, and cryptocrystalline structure with no visible cleavage.
Formation & geological history
Formed via the precipitation of silica-rich fluids in marine or volcanic environments, often during the Precambrian and Paleozoic eras.
Uses & applications
Used primarily in lapidary work, ornamental carvings, cabochons, and as a collector specimen.
Geological facts
Jasper has been utilized since ancient times for talismans, seals, and weaponry components due to its toughness and fracture properties.
Field identification & locations
Identified by its conchoidal fracture, high hardness scratching glass, and opaque earthy appearance; commonly found globally in alluvial deposits and hydrothermal veins.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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