sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7; displays earthy to vitreous luster with opaque, multicolored patterns; trigonal crystal system with conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7; displays earthy to vitreous luster with opaque, multicolored patterns; trigonal crystal system with conchoidal fracture.
Formation & geological history
Forms from the precipitation of silica-rich fluids in sedimentary basins or volcanic environments over millions of years.
Uses & applications
Commonly used in cabochons, carved ornaments, tumbled stones, and decorative lapidary work.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components due to its toughness and fracture properties.
Field identification & locations
Identify by its waxy luster, lack of cleavage, and intricate multi-colored bands or patterns; found worldwide in riverbeds and mountainous regions.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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