gemstone
Agate
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, translucent transparency, and a cryptocrystalline crystal structure with no cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, translucent transparency, and a cryptocrystalline crystal structure with no cleavage.
Formation & geological history
Formed through 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, and precision instruments like mortars and pestles.
Geological facts
Agate bands represent successive layers of microscopic quartz crystals accumulating in ancient gas cavities.
Field identification & locations
Identified by its conchoidal fracture and distinctive concentric banding, commonly found in volcanic rock regions worldwide.
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