gemstone
Blue Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, microcrystalline quartz structure, and specific gravity around 2.60.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, microcrystalline quartz structure, and specific gravity around 2.60.
Formation & geological history
Forms in low-temperature hydrothermal veins and cavities within volcanic rocks through the deposition of silica-rich solutions.
Uses & applications
Widely used in jewelry-making, carvings, and as a decorative collector gemstone.
Geological facts
Chalcedony has been used since ancient times for intricate intaglio seals, signet rings, and ornamental vessels.
Field identification & locations
Identified by its distinctive waxy luster, smooth polished surface, and uniform light blue translucent coloration.
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