Labradorite 8x11mm Leaf - 8 Inch Crystal quartz it is made up of

it is made up of volcanic glass

The inclusions can be so dense as to make the clear Quartz nearly opaque

It was used in the Egyptian Book of the Dead

iron or manganese impurities within the stone

Labradorite 8x11mm Leaf - 8 Inch Crystal quartz it is made up ofLabradorite is remarkable for the way its aggregate layers refract light, creating iridescent flashes of blue, gold, pale green or copper red. This effect is known as labradorescence, taking its name from the stone. Labradorite is usually gray to green, dark gray, light gray or black. It was discovered in Labrador, Canada in 1770 and named for the area, though it is referenced as a highly revered stone in much older Inuit tribal legends.