sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7. Colors range from deep red to brownish-red due to iron inclusions. Exhibits a vitreous to dull luster with conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7. Colors range from deep red to brownish-red due to iron inclusions. Exhibits a vitreous to dull luster with conchoidal fracture.
Formation & geological history
Formed via the precipitation of silica in silica-rich marine environments, often associated with iron formations dating back over a billion years.
Uses & applications
Commonly used for ornamental carvings, polished cabochons, beads, and as a tumbling stone for lapidary arts.
Geological facts
Ancient civilizations prized red jasper as a sacred talisman of protection and physical endurance. It is an opaque variety of chalcedony.
Field identification & locations
Identified easily by its earthy red color, lack of cleavage, and ability to scratch glass. Found worldwide, notably in India, Brazil, and the USA.
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