Labradorite 10mm Heart AA Grade - 15-16 Inch New Faceted Shapes Tourmaline is unusual in that

Tourmaline is unusual in that it is both pyroelectric and piezoelectric

or x-ray analysis

forming Tektite

1 Inches / 40x55mm / 3

Mexican Black and Red Zebra Jasper has banded and marbled patterns of translucent to opaque milky white

Labradorite 10mm Heart AA Grade - 15-16 Inch New Faceted Shapes Tourmaline is unusual in thatLabradorite 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.