gemstone
Banded Agate
Silicon dioxide, SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, exhibiting distinct concentric or parallel bands of white and brown. It has a waxy to vitreous luster with a cryptocrystalline structure and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, exhibiting distinct concentric or parallel bands of white and brown. It has a waxy to vitreous luster with a cryptocrystalline structure and conchoidal fracture.
Formation & geological history
Formed by the deposition of silica from groundwater solutions in cavities of ancient volcanic or sedimentary rocks, often over millions of years.
Uses & applications
Widely utilized in making decorative jewelry, ornamental carvings, polished specimens, and lapidary art.
Geological facts
Agates are among the oldest known gemstones used by humans, historically valued by ancient civilizations for amulets and seals.
Field identification & locations
Easily identified by its smooth, layered banding and hardness that scratches glass. Found worldwide in volcanic regions, riverbeds, and gravel deposits.
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