gemstone
Blue Agate
Silicon Dioxide (Chalcedony), SiO2
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, distinct blue banded coloration, waxy to vitreous luster, microcrystalline quartz structure, no cleavage, specific gravity of 2.60 to 2.65.
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Physical properties
Mohs hardness of 6.5 to 7, distinct blue banded coloration, waxy to vitreous luster, microcrystalline quartz structure, no cleavage, specific gravity of 2.60 to 2.65.
Formation & geological history
Formed through the deposition of silica-rich groundwater within cavities of volcanic and metamorphic rocks over millions of years.
Uses & applications
Widely used in jewelry, ornamental carvings, polished display specimens, and metaphysical collections.
Geological facts
Agate bands represent successive layers of microscopic quartz crystals settling from circulating fluids. Dyed blue varieties are very common in the commercial market.
Field identification & locations
Identified by its characteristic concentric color bands and high hardness. Commonly sourced from Brazil, India, and the United States.
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