gemstone
Blue Banded Agate
Silicon Dioxide (Chalcedony), SiO2
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, vitreous to waxy luster, microcrystalline crystal structure, and exhibits distinctive concentric color bands of blue and white.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, vitreous to waxy luster, microcrystalline crystal structure, and exhibits distinctive concentric color bands of blue and white.
Formation & geological history
Formed by the deposition of silica from groundwater in cavities of igneous and sedimentary rocks over millions of years.
Uses & applications
Widely used in lapidary arts for making polished cabochons, beads, jewelry, and decorative ornamental items.
Geological facts
Agate has been prized since antiquity as a talisman and for creating intricate cameo carvings.
Field identification & locations
Easily identified by its translucent banded patterns and hardness; found worldwide in volcanic rock cavities and river gravels.
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