Blue Kyanite 10mm Round - 15-16 Inch Inc. Trolleite is an extremely rare

Trolleite is an extremely rare aluminum phosphate mineral that crystallizes in the form of masses and small prismatic crystals

The inclusions are of manganese or iron

or black and can be distributed randomly or in bundles or star to like formations

though it also can occur in dark brown and golden colors

while maintaining the wood's original structure

Blue Kyanite 10mm Round - 15-16 Inch Inc. Trolleite is an extremely rareKyanite 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