gemstone
Agate
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy luster, and conchoidal fracture. Displays banded patterns of various colors 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 luster, and conchoidal fracture. Displays banded patterns of various colors formed by alternating layers of chalcedony and quartz.
Formation & geological history
Formed by the deposition of silica from groundwater in the cavities of igneous and sedimentary rocks over millions of years.
Uses & applications
Widely used in jewelry, decorative ornaments, and precision instruments due to its durability and chemical resistance.
Geological facts
Agate was highly prized in the ancient world as a talisman and for making ornate seals and vessels.
Field identification & locations
Easily identified by its distinct concentric banding and waxy luster; found globally in volcanic rock cavities and river gravels.
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