gemstone
Carnelian
Silicon dioxide (Chalcedony), SiO2
AI-generated identification · may be incorrectHardness is 7 on the Mohs scale, color ranges from orange to deep red-brown, exhibits a vitreous to waxy luster, and displays a cryptocrystalline structure with conchoidal fracture.
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Physical properties
Hardness is 7 on the Mohs scale, color ranges from orange to deep red-brown, exhibits a vitreous to waxy luster, and displays a cryptocrystalline structure with conchoidal fracture.
Formation & geological history
Forms in low-temperature hydrothermal environments or within cavities of volcanic and sedimentary rocks as silica-rich groundwater deposits microcrystalline quartz.
Uses & applications
Widely used in jewelry-making, signet rings, beads, and ornamental carvings due to its rich color and durability.
Geological facts
Carnelian has been prized since ancient times, frequently used in ancient Egyptian and Roman signet rings and amulets.
Field identification & locations
Identified by its distinctive reddish-orange hue, waxy luster, and translucent quality; commonly sourced from India, Brazil, and Uruguay.
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