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Black Eye Agate is a variety of Sardonyx which has a Sard base
Biotite is a name used for a large group of black mica minerals that are commonly found in igneous and metamorphic rocks
When using Labradorite for decor
spread by the impact with the earth or moved through glacial changes
This stone has not been dyed or enhanced in any way
Bloody Iolite 10mm Round A Grade - 15-16 Inch Flat Black Eye Agate is aIolite most commonly occurs in shades of blue to gray, violet or indigo. It displays a visual property called pleochroism, which means that it can appear to be different colors as it shifts in the light. According to Norse legend, Viking explorers used thin pieces of Iolite as the worlds first polarizing lens to help them determine the exact location of the sun for navigation.