gemstone
Agate
Silicon Dioxide (Chalcedony), SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, microcrystalline crystal structure, and exhibits distinctive banded patterns.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, microcrystalline crystal structure, and exhibits distinctive banded patterns.
Formation & geological history
Formed by the deposition of silica from groundwater in the cavities of igneous and sedimentary rocks, often over millions of years.
Uses & applications
Widely used for ornamental objects, jewelry, tumbled stones, and precision instruments like mortars and pestles.
Geological facts
Agates often form inside volcanic vesicles, preserving ancient mineral solutions in colorful, concentric layers.
Field identification & locations
Identify by its waxy luster, hardness scratching glass, and characteristic curved or concentric banding. Found worldwide.
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