mineral
White Chalcedony
Silicon Dioxide (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, translucent to opaque transparency, microcrystalline quartz structure with no visible cleavage, and a specific gravity around 2.58 to 2.64.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, translucent to opaque transparency, microcrystalline quartz structure with no visible cleavage, and a specific gravity around 2.58 to 2.64.
Formation & geological history
Forms in low-temperature hydrothermal environments, volcanic cavities (vugs and vesicles), and sedimentary rocks by the precipitation of silica from aqueous solutions, often occurring over millions of years.
Uses & applications
Used in carving, ornamental objects, lapidary arts, jewelry, and metaphysical healing practices.
Geological facts
Chalcedony has been used since antiquity to create intaglios, seals, and precious carvings due to its fine grain and durability.
Field identification & locations
Identified by its waxy luster, conchoidal fracture, and lack of visible crystal faces; commonly found globally in association with volcanic and sedimentary rock formations.
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