sedimentary
Red Jasper
Silicon dioxide with iron inclusions (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque red color due to iron oxide impurities, vitreous to dull luster, and microcrystalline quartz structure with conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque red color due to iron oxide impurities, vitreous to dull luster, and microcrystalline quartz structure with conchoidal fracture.
Formation & geological history
Forms through the hydrothermal deposition of silica-rich fluids or accumulation of silica-rich radiolarian ooze, often in marine environments during the Precambrian and Paleozoic eras.
Uses & applications
Widely used in jewelry, ornamental carvings, polished tumbling stones, and metaphysical practices.
Geological facts
Red jasper has been used since ancient times for talismans and seals, frequently mentioned in various historical lapidary texts.
Field identification & locations
Identified by its rich opaque red coloration, lack of cleavage, and ability to scratch glass. Commonly found globally in hydrothermal veins and sedimentary deposits.
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