sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors from iron impurities, and a conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors from iron impurities, and a conchoidal fracture.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, often via silica-rich hydrothermal fluids depositing quartz in cavities.
Uses & applications
Used primarily in ornamental carvings, cabochons, jewelry, and as a collector mineral.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry like arrowheads due to its toughness and fracture properties.
Field identification & locations
Identify in the field by its waxy luster, hardness that scratches glass, and inability to be easily scratched by a steel knife. Found globally in sedimentary and volcanic deposits.
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