Green Kyanite 5x10-20mm Top Drill Teeth - 15-16 Inch Stone Type_Shattuckite Many stones in the Russian

Many stones in the Russian crown jewels from the 17th century which were thought to be rubies are actually red Tourmaline

as well as grays

It may also contain rainbow-colored or sparkling inclusions

Labradorite is remarkable for the way its aggregate layers refract light

a variety of Jasper containing variably colored spherical patterns

Green Kyanite 5x10-20mm Top Drill Teeth - 15-16 Inch Stone Type_Shattuckite Many stones in the RussianKyanite often occurs as long, bladed, striated crystals, transparent or translucent with a pearly luster. An aluminum silicate mineral, it may appear in white, pink, yellow, orange, green, blue, gray and black. In addition to its value as a gemstone, Kyanite is also extremely useful in industrial applications due to its high heat resistance. It is often used in kiln furniture and foundry molds, as well as for brake shoes, grinding wheels and cutting