Blue Onyx cabochon (A grade) Style:Cab 2 is a variety of Quartz
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Blue Onyx cabochon (A grade) Style:Cab 2 is a variety of QuartzBlue Onyx is a variety of Onyx, which is a type of Chalcedony, that crystallizes in the form of blue, white, and brown banded masses. Just like Blue Chalcedony, its color is caused by what we refer to as the Tyndall Effect which occurs when light scatters from colloid sized particles. The highest quality Blue Onyx is found in Argentina, while most other commercial deposits are found in Mexico. Locality: Argentina A cabochons measure approx. 1" to 2. 5"
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