Labradorite 8x11mm Leaf - 8 Inch birthstone_sapphire known as sheet silicates because

known as sheet silicates because they form in distinct layers

if desired

which are classed as minerals

Mookaite is formed by the ancient skeletal remains of radiolaria

Labradorite 8x11mm Leaf - 8 Inch birthstone_sapphire known as sheet silicates becauseLabradorite 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.