Labradorite Natural 4x6mm Rondelle AAA Grade - 15-16 Inch 6mm ” Tourmaline is unusual in

” Tourmaline is unusual in that it is both pyroelectric and piezoelectric

Iron gives them blue

including Moonstone

This effect is known as “labradorescence

It is made up of Calcite or Calcium Carbonate

Labradorite Natural 4x6mm Rondelle AAA Grade - 15-16 Inch 6mm ” Tourmaline is unusual inLabradorite 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.