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originally from the Lapis-Lazuli mine in Afghanistan
with indigo being the most rare
It is extremely fracture to resistant and has been used for blades and other tools since Neolithic times
second only to diamond
Blue Nepal Kyanite 3x6-5x8mm Grauated Faceted Rondelle Necklace - 15-16 Inch Faceted Cube originally from the Lapis-Lazuli mineKyanite 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
