sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque luster, smooth or waxy texture, conchoidal fracture, specific gravity 2.58-2.91.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque luster, smooth or waxy texture, conchoidal fracture, specific gravity 2.58-2.91.
Formation & geological history
Formed by the precipitation of silica-rich fluids in sedimentary or volcanic environments, often involving iron oxide impurities.
Uses & applications
Used in ornamental carvings, cabochons, jewelry, and decorative polished stones.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry. It is a dense, opaque variety of chalcedony.
Field identification & locations
Identified by its rich color patterns, hardness, and waxy luster. Commonly found in riverbeds and ancient mineral veins globally.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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