Iolite Faceted 10mm Energy Prism - 15-16 Inch featured_07172025 a mineral of the Quartz

a mineral of the Quartz family

Black Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins

It can even exhibit various colors within the same specimen

” Due to this variety of colors

with every gradient of gray in between

Iolite Faceted 10mm Energy Prism - 15-16 Inch featured_07172025 a mineral of the QuartzIolite 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.