sedimentary
Jasper
Silicon dioxide (SiO2) microcrystalline quartz
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, red to brown color with vitreous to dull luster, and cryptocrystalline structure with conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, red to brown color with vitreous to dull luster, and cryptocrystalline structure with conchoidal fracture.
Formation & geological history
Formed through the precipitation of silica-rich fluids in marine or volcanic environments over millions of years.
Uses & applications
Used primarily in ornamental carvings, cabochons, jewelry, and lapidary art.
Geological facts
Red jasper gets its characteristic crimson hue from iron oxide inclusions within the silica matrix.
Field identification & locations
Found worldwide in alluvial gravels and ancient riverbeds; identified by its opaque nature and hardness.
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