mineral
Yellow Chalcedony
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture.
Formation & geological history
Formed in low-temperature hydrothermal environments and cavities of volcanic rocks through the deposition of silica-rich solutions.
Uses & applications
Used in ornamental carvings, gemstone jewelry, and metaphysical healing practices.
Geological facts
Chalcedony has been used since antiquity for intaglios and seals due to its toughness and ability to take a fine polish.
Field identification & locations
Identify by its waxy luster, microcrystalline texture, and conchoidal breakage; found globally in regions with volcanic activity.
