mineral
Chalcedony
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture.
Formation & geological history
Forms in low-temperature hydrothermal veins and cavities within rocks through the precipitation of silica-rich solutions.
Uses & applications
Used in ornamental carvings, jewelry, and lapidary arts due to its durability and attractive appearance.
Geological facts
Chalcedony is the parent mineral for many well-known varieties like agate, jasper, and onyx.
Field identification & locations
Identified by its waxy luster, smooth touch, and inability to be scratched by a steel knife. Found worldwide.
