Iolite 6mm Double Heart Faceted - 15-16 Inch clover Black Gold Amazonite is a

Black Gold Amazonite is a member of the Feldspar family and varies in hue from robin’s egg blue to blue-green to black

with some transparent inclusions

Biotite was named in honor of the French physicist Jean-Baptiste Biot

These form as a criss cross banding called lamellae

Iolite 6mm Double Heart Faceted - 15-16 Inch clover Black Gold Amazonite 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.