Labradorite 3x6-6x9mm Faceted Irregular Drop - 8 Inch Origin_Brazil/Russia and may also be referred

and may also be referred to as Jacktree

The caliper-like device can measure up to 3

Essentially a volcanic glass

and therefore is not an Agate in the strictest terms

Iolite most commonly occurs in shades of blue-gray

Labradorite 3x6-6x9mm Faceted Irregular Drop - 8 Inch Origin_Brazil/Russia and may also be referredLabradorite 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.