gemstone
Agate
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, waxy to vitreous luster, microcrystalline quartz structure with distinctive concentric banding, and specific gravity around 2.6.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, waxy to vitreous luster, microcrystalline quartz structure with distinctive concentric banding, and specific gravity around 2.6.
Formation & geological history
Formed by the deposition of silica from groundwater in cavities of igneous and metamorphic rocks, typically over millions of years.
Uses & applications
Widely used for making jewelry, ornamental carvings, polished specimens, and precision instruments due to its durability.
Geological facts
Agate is one of the most popular tumbling stones and has been used since ancient times for amulets and seals.
Field identification & locations
Easily identified by its translucent to opaque banded layers; commonly found globally in volcanic rock cavities and riverbeds.
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