sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, vibrant red to reddish-brown color, waxy luster, and opaque with a cryptocrystalline structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, vibrant red to reddish-brown color, waxy luster, and opaque with a cryptocrystalline structure.
Formation & geological history
Forms through the hydrothermal deposition of silica-rich solutions or accumulation of radiolarian ooze, often occurring in ancient marine environments.
Uses & applications
Widely used in ornamental carvings, cabochons, jewelry, and as a popular decorative stone for collectors.
Geological facts
Red color is primarily caused by iron oxide inclusions within the silica matrix, and it has been used for amulets and seals since ancient times.
Field identification & locations
Identified by its distinctive opaque red coloration, conchoidal fracture, and inability to be scratched by a steel knife. Commonly found globally, particularly in India, Brazil, and the USA.
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