Iolite 4mm Microfaceted Round A Grade - 15-16 Inch Rhyolite12mm Blue Apatite ranges in color

Blue Apatite ranges in color from light teal to blue to bright blue to dark blue to green

as well as red or brown either from oxidation or Hematite inclusions

tourmaline and other minerals

Impression Jasper comes in a variety of colors and possibly more names

with little alteration of the external shape of the original crystal

Iolite 4mm Microfaceted Round A Grade - 15-16 Inch Rhyolite12mm Blue Apatite ranges in colorIolite 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.