sedimentary
Polychrome Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5-7 on the Mohs scale, opaque luster, smooth tumbled texture, multicolored with distinctive banding of red, yellow, brown, and white, trigonal crystal structure.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque luster, smooth tumbled texture, multicolored with distinctive banding of red, yellow, brown, and white, trigonal crystal structure.
Formation & geological history
Formed from silica-rich hydrothermal solutions or deposits of silica in ancient sedimentary environments, often associated with volcanic ash and alteration.
Uses & applications
Widely used in lapidary arts, tumbled stones, wire-wrapped jewelry, decorative objects, and as a collector's specimen.
Geological facts
Polychrome Jasper, also known as Desert Jasper, was only recently discovered in Madagascar in 2006, making it a relatively new find in the mineral world.
Field identification & locations
Identified by its vivid, earthy multicolored banding and waxy to vitreous luster when polished. Common locations include Madagascar and various arid regions worldwide.
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