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Unsealed granite may discolor when exposed to oil
angular fragments
It is typically white or light gray with gray
The blue color
The crystal naturally forms with 18 facets
Blue Kyanite 8mm Round - 15-16 Inch Faceted Nugget Unsealed granite may discolor whenKyanite 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