Iolite 8mm Bicone Faceted - 15-16 Inch Evening Blue Peridot is one of few

Peridot is one of few stones that occurs naturally in only one color

It is often thought of as an all-black stone

It is opaque

and was prized in ancient times for the ultramarine dye derived from it

Labradorite is remarkable for the way its aggregate layers refract light

Iolite 8mm Bicone Faceted - 15-16 Inch Evening Blue Peridot is one of fewIolite 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.