mineral
Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture.
Formation & geological history
Forms in low-temperature hydrothermal environments, filling cavities in volcanic and sedimentary rocks.
Uses & applications
Used primarily in ornamental carvings, gemstone cabochons, and mineral collections.
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 and botryoidal habit; found worldwide, particularly in Brazil, India, and the USA.
