sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7; displays red, white, and earthy tones with a waxy to dull luster and conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7; displays red, white, and earthy tones with a waxy to dull luster and conchoidal fracture.
Formation & geological history
Formed via the precipitation of silica-rich fluids within sedimentary or volcanic environments, often dating back to Precambrian times.
Uses & applications
Used primarily in lapidary arts, ornamental carvings, polished cabochons, and as a collector specimen.
Geological facts
The distinct red and white banding is caused by iron oxide impurities dispersed throughout the chalcedony matrix.
Field identification & locations
Identify by its high hardness, smooth polished or water-worn surface, and opaque microcrystalline structure; found worldwide in riverbeds and ancient seabed formations.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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