sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture with distinct banding.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and conchoidal fracture with distinct banding.
Formation & geological history
Formed through the deposition of silica from groundwater in cavities of ancient volcanic or sedimentary rocks over millions of years.
Uses & applications
Used extensively in jewelry, ornamental carvings, polished display specimens, and industrial knife-edge bearings.
Geological facts
Agate bands represent successive layers of microscopic quartz crystals deposited inside gas cavities in volcanic rock.
Field identification & locations
Identified by its translucent banded patterns and hardness; commonly found in riverbeds, volcanic regions, and gravel deposits worldwide.
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