sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, earthy to vitreous luster, opaque red-orange color, and conchoidal fracture with no visible crystal structure.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, earthy to vitreous luster, opaque red-orange color, and conchoidal fracture with no visible crystal structure.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, where silica-rich fluids precipitate quartz in pore spaces over millions of years.
Uses & applications
Used primarily in ornamental carvings, cabochons, lapidary art, and geological specimen collecting.
Geological facts
Red hues in jasper are caused by iron oxide inclusions. Ancient civilizations widely used it for amulets and seals.
Field identification & locations
Identified by its dense opaque appearance, waxy luster, and inability to be scratched by steel. Found globally in riverbeds and hydrothermal veins.
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