sedimentary
Red Jasper
Silicon dioxide with iron oxide impurities (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, microcrystalline quartz structure, uneven or conchoidal fracture, and specific gravity of 2.65.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, microcrystalline quartz structure, uneven or conchoidal fracture, and specific gravity of 2.65.
Formation & geological history
Formed through the precipitation of silica in silica-rich marine environments, often associated with hydrothermal activity or volcanic processes.
Uses & applications
Commonly used for lapidary work, carved into ornaments, polished as tumbled stones, and used in low-cost jewelry.
Geological facts
Red jasper has been used since ancient times for talismans and seals, prized by many cultures for its deep earthy red color caused by iron inclusions.
Field identification & locations
Identify by its waxy luster, opaque reddish coloration, and hardness that scratches glass. Found worldwide in riverbeds, hydrothermal veins, and sedimentary deposits.
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