gemstone
Agate
Silicon dioxide (Chalcedony, SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy luster, conchoidal fracture, and distinct multicolored bands.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy luster, conchoidal fracture, and distinct multicolored bands.
Formation & geological history
Forms by the deposition of silica from groundwater in cavities of igneous and sedimentary rocks over millions of years.
Uses & applications
Widely used in jewelry, ornamental carvings, decorative items, and historically for precision instruments like mortar and pestles.
Geological facts
Agate bands represent successive layers of silica deposition reflecting changing environmental conditions during formation.
Field identification & locations
Identified by its waxy luster, hardness scratching glass, and characteristic concentric banding; found worldwide.
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