sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, opaque red to reddish-brown color, waxy luster, and conchoidal fracture with no cleavage.
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Physical properties
Mohs hardness of 6.5 to 7, opaque red to reddish-brown color, waxy luster, and conchoidal fracture with no cleavage.
Formation & geological history
Formed through the precipitation of silica-rich fluids in marine environments or hydrothermal veins, often accumulating in sedimentary deposits over millions of years.
Uses & applications
Widely used in ornamental carvings, cabochons, jewelry, and as a popular specimen for mineral collectors.
Geological facts
Red jasper has been used since ancient times for talismans, seals, and weaponry components like arrowheads due to its toughness.
Field identification & locations
Easily identified in the field by its distinct red opaque color, hardness exceeding glass, and smooth conchoidal breakage. Commonly found globally in river gravels and hydrothermal deposits.
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