Iolite 4mm Microfaceted Round A Grade - 15-16 Inch Cantera Opal This topaz is found in

This topaz is found in the cavities of a pegmatite

Iolite most commonly occurs in shades of blue to gray

but will not be chemically treated or altered

" and variants of the name in other languages

Once cooled

Iolite 4mm Microfaceted Round A Grade - 15-16 Inch Cantera Opal This topaz is found inIolite 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.