Blue Kyanite 10mm Round - 15-16 Inch R1851 The name derives from the

The name derives from the Greek word for “not intoxicated” and was once believed to prevent drunkenness and overindulgence

yellow to green or sea to green in color

It's actually a pink variety of Beryl -- the family of gemstones that also includes Aquamarine

any color of the rainbow

Blue Kyanite 10mm Round - 15-16 Inch R1851 The name derives from theKyanite 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