sedimentary
Red Jasper
Silicon Dioxide with iron impurities (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, deep red to brownish-red color, vitreous to dull luster, and microcrystalline crystal structure with conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, deep red to brownish-red color, vitreous to dull luster, and microcrystalline crystal structure with conchoidal fracture.
Formation & geological history
Forms through the silica-rich precipitation of hydrothermal fluids or silica-rich oozes, often associated with ancient marine environments.
Uses & applications
Widely used in ornamental carvings, polished cabochons for jewelry, and as a popular specimen for rock tumbling and collection.
Geological facts
Red jasper is an opaque, microcrystalline variety of quartz that often contains up to 20% foreign materials, which account for its rich colors and patterns.
Field identification & locations
Easily identified in the field by its opaque red color, high hardness that scratches glass, and smooth, waxy conchoidal fracture.
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