gemstone
Tumbled Agate
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale. Exhibits a waxy to vitreous luster and a translucent to opaque appearance with microcrystalline quartz structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale. Exhibits a waxy to vitreous luster and a translucent to opaque appearance with microcrystalline quartz structure.
Formation & geological history
Formed through the deposition of silica from groundwater in cavities of igneous and sedimentary rocks over millions of years.
Uses & applications
Widely used in jewelry, decorative ornaments, and as a popular tumbled stone for crystal collections.
Geological facts
Agate has been used for ornamentation since ancient times, notably in seals, rings, and vessels by ancient Greeks and Egyptians.
Field identification & locations
Identified by its smooth tumbled surface, conchoidal fracture, and characteristic micro-banding when viewed closely; found globally in volcanic rock cavities.
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