gemstone
Agate
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, waxy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.6-2.7.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, waxy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.6-2.7.
Formation & geological history
Forms by the deposition of silica from groundwater in the cavities of igneous and sedimentary rocks over millions of years.
Uses & applications
Widely used in ornamental carvings, jewelry, tumbled stones, and precision instruments.
Geological facts
Agate bands represent successive layers of silica solution entering a cavity, creating unique concentric patterns.
Field identification & locations
Identified by its distinct colorful banding and waxy luster; found worldwide in volcanic rocks.
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