sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque red to reddish-brown color, vitreous to dull luster, and microcrystalline trigonal structure with conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque red to reddish-brown color, vitreous to dull luster, and microcrystalline trigonal structure with conchoidal fracture.
Formation & geological history
Formed from silica-rich sediments or volcanic ash accumulating on ocean floors, often colored by iron oxide impurities during ancient periods.
Uses & applications
Widely used for tumbled decorative stones, cabochons, carvings, and low-cost jewelry or collector specimens.
Geological facts
Red jasper has been valued since ancient times for talismans and seals, frequently mentioned in medieval lapidary books.
Field identification & locations
Easily identified by its deep red opaque appearance, waxy luster, and resistance to steel scratching; found worldwide in riverbeds and mountainous regions.
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