sedimentary
Jasper with Quartz Vein
Microcrystalline quartz (SiO2) with impurities
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque to translucent, conchoidal fracture, colors typically include brown, green, and red with white quartz inclusions.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque to translucent, conchoidal fracture, colors typically include brown, green, and red with white quartz inclusions.
Formation & geological history
Formed through the silification of sedimentary or volcanic deposits where silica-rich fluids precipitate microcrystalline quartz in fractures and cavities.
Uses & applications
Commonly used in lapidary arts, tumbled stones, decorative ornaments, and gemstone jewelry.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components due to its toughness and fracture properties.
Field identification & locations
Found worldwide in riverbeds, glacial tills, and sedimentary rock formations; identified by its hardness, smooth polished texture when water-worn, and lack of cleavage.
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