mineral
Agate
Silicon dioxide (chalcedony, SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy luster, microcrystalline quartz structure, conchoidal fracture, specific gravity of 2.60 to 2.65.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy luster, microcrystalline quartz structure, conchoidal fracture, specific gravity of 2.60 to 2.65.
Formation & geological history
Forms primarily within cavities of volcanic and metamorphic rocks through the deposition of silica-rich groundwater over millions of years.
Uses & applications
Widely used in ornamental carvings, jewelry, polished specimens, and precision instruments.
Geological facts
Agate bands represent successive layers of microscopic quartz crystals deposited inside gas cavities in ancient lavas.
Field identification & locations
Identified by its distinctive concentric banding and waxy luster; found globally in volcanic regions, particularly Brazil, Uruguay, and the USA.
