gemstone
Carnelian Agate
Silicon Dioxide (Chalcedony variety), SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale. Exhibits a waxy to vitreous luster with a translucent to opaque appearance, displaying distinctive reddish-orange to brownish-red banding.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale. Exhibits a waxy to vitreous luster with a translucent to opaque appearance, displaying distinctive reddish-orange to brownish-red banding.
Formation & geological history
Formed by the deposition of silica from groundwater in cavities of ancient volcanic or sedimentary rocks, often over millions of years.
Uses & applications
Widely used in ornamental jewelry, carved cameos, beads, and prized by mineral collectors.
Geological facts
Carnelian has been used since ancient times, notably by the ancient Egyptians as a protective amulet for the afterlife. Its vibrant red-orange color comes from iron oxide impurities.
Field identification & locations
Identify by its waxy luster, conchoidal fracture, and characteristic orange-red color. Commonly found in Brazil, India, and the USA.
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