Kyanite Multi 4mm Round - 15-16 Inch Australian Boulder Opal and crystal formations on the

and crystal formations on the collars are natural and unenhanced in any way

and was prized in ancient times for the ultramarine dye derived from it

Hubei Turquoise is sourced from Hubei Province in Northern China

King Tutankhamun’s death mask was studded with Turquoise

Howlite can be easily dyed and is often treated to be blue for use as a substitute for turquoise

Kyanite Multi 4mm Round - 15-16 Inch Australian Boulder Opal and crystal formations on 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