mineral
Blue Chalcedony
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, pale blue to lavender color, waxy to vitreous luster, and microcrystalline quartz structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, pale blue to lavender color, waxy to vitreous luster, and microcrystalline quartz structure.
Formation & geological history
Formed in low-temperature hydrothermal environments and cavities of volcanic rocks through the deposition of silica-rich solutions.
Uses & applications
Commonly used in lapidary arts, ornamental carvings, and gemstone jewelry.
Geological facts
Chalcedony has been used since ancient times for making seals, signet rings, and intricate carved cameos.
Field identification & locations
Identified by its waxy luster, conchoidal fracture, and translucent light-blue coloration; found worldwide including USA, Turkey, and India.
