Iolite 4mm Microfaceted Round A Grade - 15-16 Inch Cantera Opal but will not be chemically

but will not be chemically treated or altered

It contains inclusions such as copper and iron

the third to hardest common natural gemstone

" and variants of the name in other languages

Tourmalated Quartz is clear Quartz that has formed with Black Tourmaline

Iolite 4mm Microfaceted Round A Grade - 15-16 Inch Cantera Opal but will not be chemicallyIolite 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.