sedimentary
Red Jasper with Quartz Veining
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, reddish-brown color with lighter quartz or calcite veining, dull to vitreous luster, cryptocrystalline crystal structure, conchoidal fracture, specific gravity of 2.58 to 2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, reddish-brown color with lighter quartz or calcite veining, dull to vitreous luster, cryptocrystalline crystal structure, conchoidal fracture, specific gravity of 2.58 to 2.91.
Formation & geological history
Forms from the precipitation of silica-rich fluids in fractures and cavities within sedimentary or volcanic rocks, often occurring during hydrothermal activity or low-grade metamorphism.
Uses & applications
Used for lapidary work, decorative cabochons, ornamental carvings, and gemstone collection.
Geological facts
Red Jasper has been used since ancient times for amulets, seals, and weaponry components due to its hardness and durability.
Field identification & locations
Can be identified by its distinctive red coloration mixed with lighter bands of quartz, lack of cleavage, and ability to scratch glass.
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