sedimentary
Agate
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on Mohs scale, waxy to vitreous luster, microcrystalline quartz structure with distinctive concentric banding, and specific gravity around 2.65.
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Physical properties
Hardness of 6.5-7 on Mohs scale, waxy to vitreous luster, microcrystalline quartz structure with distinctive concentric banding, and specific gravity around 2.65.
Formation & geological history
Formed by the deposition of silica from groundwater in cavities of volcanic and metamorphic rocks over millions of years.
Uses & applications
Widely used in ornamental carvings, decorative objects, jewelry, and as a popular specimen for mineral collectors.
Geological facts
Agate is an ancient healing stone historically used by civilizations like the Ancient Greeks and Egyptians for amulets and seals.
Field identification & locations
Easily identified by its characteristic translucent banding and high scratch resistance, commonly found worldwide in volcanic regions and river gravels.
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