mineral
Chalcedony
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy luster, translucent to transparent, and microcrystalline crystal structure with conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy luster, translucent to transparent, and microcrystalline crystal structure with conchoidal fracture.
Formation & geological history
Forms in low-temperature hydrothermal environments and by the deposition of silica-rich groundwater within rock cavities and fissures.
Uses & applications
Commonly used in lapidary arts, ornamental carvings, and jewelry making due to its durability and polishability.
Geological facts
Chalcedony is the cryptocrystalline form of quartz that serves as the parent material for several other well-known gemstones like agate and jasper.
Field identification & locations
Identify by its waxy luster, conchoidal fracture, and lack of visible crystal faces; found worldwide in volcanic and sedimentary deposits.
