gemstone
Carnelian Agate
Silicon Dioxide (Chalcedony variety), SiO2
AI-generated identification · may be incorrectHardness of 6.5-7 on Mohs scale. Colors range from orange, reddish-orange to deep brown-red. Vitreous to waxy luster, microcrystalline crystal structure with no cleavage and a conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on Mohs scale. Colors range from orange, reddish-orange to deep brown-red. Vitreous to waxy luster, microcrystalline crystal structure with no cleavage and a conchoidal fracture.
Formation & geological history
Formed by the deposition of silica from groundwater in cavities of igneous and sedimentary rocks, often in ancient volcanic environments.
Uses & applications
Widely used in jewelry, cabochons, carvings, and as a popular specimen for rock collectors.
Geological facts
Historically valued in ancient civilizations like Egypt and Rome for signet rings and amulets due to its durability and rich color.
Field identification & locations
Identified by its translucent orange-red banding and waxy luster. Found worldwide, notably in Brazil, India, and the USA.
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