mineral
Yellow Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, yellow to brownish-yellow color, waxy to vitreous luster, and cryptocrystalline structure with no visible cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, yellow to brownish-yellow color, waxy to vitreous luster, and cryptocrystalline structure with no visible cleavage.
Formation & geological history
Forms in hydrothermal veins and cavities of volcanic rocks through the deposition of silica-rich solutions at low temperatures.
Uses & applications
Widely used in jewelry-making as cabochons, carved ornaments, and rings due to its attractive luster and durability.
Geological facts
Chalcedony has been used since antiquity for making intaglios and seals because it holds fine carved details exceptionally well.
Field identification & locations
Identified by its conchoidal fracture, waxy luster, and lack of crystal faces; commonly found in worldwide localities including Brazil, India, and Indonesia.
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