Bloody Iolite 2.5mm Banded Table Cut Cube Bead - 15-16 Inch Orange Calcite gray and white and its

gray and white and its swirling

Prehnite was the first mineral to be named after a person: its discoverer

It is made up of Calcite or Calcium Carbonate

or color-enhanced

Bloody Iolite 2.5mm Banded Table Cut Cube Bead - 15-16 Inch Orange Calcite gray and white and itsIolite 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.