gemstone
Agate
Silicon dioxide (Chalcedony), SiO2
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, exhibits distinct concentric color banding, waxy to vitreous luster, and has a cryptocrystalline structure with no cleavage.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, exhibits distinct concentric color banding, waxy to vitreous luster, and has a cryptocrystalline structure with no cleavage.
Formation & geological history
Formed by the deposition of silica from groundwater in cavities of igneous and metamorphic rocks, frequently occurring in volcanic vesicles.
Uses & applications
Widely used for making jewelry, decorative ornaments, carvings, and precision instruments like mortars and pestles due to its durability.
Geological facts
Agate is one of the oldest known talismanic stones, prized since ancient times for its soothing banded patterns and protective qualities.
Field identification & locations
Easily identified in the field by its characteristic translucent curved banding and conchoidal fracture; commonly found in volcanic regions worldwide.
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