Iolite 10mm Round A Grade - 15-16 Inch R0509 rainbow effect of light refracting

rainbow effect of light refracting off of the air buddles inside of the stone

Because of its softness

Peruvian Turquoise is also known as Turquoise Chrysocolla

golden tan

and beads per strand counts may vary slightly from what is listed

Iolite 10mm Round A Grade - 15-16 Inch R0509 rainbow effect of light refractingIolite 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.