gemstone
Carnelian
Silicon dioxide (Chalcedony variety)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, red to reddish-orange color, waxy to vitreous luster, and microcrystalline trigonal structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, red to reddish-orange color, waxy to vitreous luster, and microcrystalline trigonal structure.
Formation & geological history
Forms in silica-rich groundwater solutions within cavities of pre-existing rocks, often accumulating in volcanic environments over millions of years.
Uses & applications
Extensively used in jewelry making, signet rings, carvings, and ornamental lapidary work.
Geological facts
Carnelian was highly prized in ancient civilizations like Egypt and Rome for protective amulets and royal seal rings.
Field identification & locations
Identified by its distinctive translucent reddish-orange hue and conchoidal fracture, commonly sourced from India, Brazil, and Uruguay.
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