mineral
Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture.
Formation & geological history
Forms in low-temperature hydrothermal environments and by deposition from silica-rich groundwater within cavities in rocks.
Uses & applications
Used in ornamental carvings, gemstone jewelry, and industrial abrasives.
Geological facts
Ancient cultures frequently carved chalcedony into intaglios and seals due to its toughness and ability to take a fine polish.
Field identification & locations
Identified by its waxy luster and cryptocrystalline texture; commonly found worldwide in volcanic and sedimentary rock cavities.
