gemstone
Agate
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, conchoidal fracture, specific gravity 2.6-2.7.
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Physical properties
Hardness 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, conchoidal fracture, specific gravity 2.6-2.7.
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, ornamental carvings, decorative items, and precision instruments.
Geological facts
Agate bands represent successive layers of deposition of silica solutions in gas cavities of volcanic rocks.
Field identification & locations
Identify by its distinct concentric banding, translucent appearance, and high hardness capable of scratching glass.
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