gemstone
Carnelian (with Turquoise and Agate jewelry)
Chalcedony (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness 6.5-7 on Mohs scale; waxy to vitreous luster; translucent reddish-orange to brownish-red; cryptocrystalline quartz structure.
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Physical properties
Hardness 6.5-7 on Mohs scale; waxy to vitreous luster; translucent reddish-orange to brownish-red; cryptocrystalline quartz structure.
Formation & geological history
Formed through low-temperature precipitation of silica-rich groundwater within cavities and veins of volcanic or sedimentary host rocks.
Uses & applications
Widely crafted into prayer beads (tasbih/misbaha), cabochon rings, bracelets, seals, and ornamental amulets.
Geological facts
Carnelian has been prized for over 4,000 years, notably in ancient Egypt, Mesopotamia, and Islamic cultures as the traditional Aqeeq stone.
Field identification & locations
Recognized by its smooth waxy luster, lack of cleavage, and rich warm red-orange translucency under light; major deposits occur in India, Madagascar, and Brazil.
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