gemstone
Blue Agate Ring
Silicon Dioxide (Chalcedony variety Agate), SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, vitreous to waxy luster, microcrystalline crystal structure (cryptocrystalline quartz), concoidal fracture with no true cleavage, specific gravity of 2.58-2.64.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, vitreous to waxy luster, microcrystalline crystal structure (cryptocrystalline quartz), concoidal fracture with no true cleavage, specific gravity of 2.58-2.64.
Formation & geological history
Agate typically forms in cavities of volcanic and metamorphic rocks through the deposition of silica from groundwater solutions, often in concentric bands.
Uses & applications
Primarily used in jewelry, ornamental carvings, talismans, and as a collectible specimen.
Geological facts
Agate has been used for ornamentation and healing amulets since ancient Babylonian times. Blue agate is frequently treated or dyed to enhance its rich blue hue, though naturally occurring blue chalcedony exists.
Field identification & locations
Can be identified by its distinctive banded patterns or rich translucent color under light. Commonly found worldwide, especially in Brazil, India, Madagascar, and the United States.
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