sedimentary
Agate
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, and conchoidal fracture. Displays distinct colored banding patterns formed by alternating layers of chalcedony and quartz.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, and conchoidal fracture. Displays distinct colored banding patterns formed by alternating layers of chalcedony and quartz.
Formation & geological history
Formed by the deposition of silica from groundwater in the cavities of ancient volcanic and metamorphic rocks over millions of years.
Uses & applications
Widely used in ornamental jewelry, decorative carvings, lapidary art, and as a popular mineral specimen for collectors.
Geological facts
Agate was highly prized in ancient civilizations like Ancient Egypt and Greece for use in protective amulets, seals, and ornate vessels.
Field identification & locations
Easily identified by its translucent to opaque banded patterns and smooth waxy feel. Found worldwide, particularly in Brazil, Uruguay, and parts of the United States.
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