sedimentary
Orbicular Jasper
Silicon Dioxide (SiO2) with microcrystalline quartz inclusions
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, multicolored spherical patterns or orbicular inclusions, waxy to vitreous luster, and cryptocrystalline structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, multicolored spherical patterns or orbicular inclusions, waxy to vitreous luster, and cryptocrystalline structure.
Formation & geological history
Formed via the precipitation of silica-rich fluids in volcanic rock cavities or fractures, typically during the Cretaceous period.
Uses & applications
Extensively used for making cabochons, polished decorative display pieces, jewelry, and prized by mineral collectors.
Geological facts
Orbicular jasper often displays distinct orb-like patterns created by radial crystal growths of quartz and chalcedony.
Field identification & locations
Identified by its multicolored spherical orb patterns and conchoidal fracture; commonly found in Madagascar, Australia, and parts of the USA.
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