Blue Kyanite 10mm Round - 15-16 Inch 9x13mm Biotite is a name used

Biotite is a name used for a large group of black mica minerals that are commonly found in igneous and metamorphic rocks

as well as translucent and iridescent

This material is known for its vivid blues

the tiles slide instead of shattering absorbing the energy of the blow

and the Nuclear Regulatory Commission has stated that they are safe to handle and wear

Blue Kyanite 10mm Round - 15-16 Inch 9x13mm Biotite is a name usedKyanite 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