Blue Kyanite 5x10-20mm Top Drill Teeth - 15-16 Inch 1109202148HR Green is the most common

Green is the most common color for Aventurine

abbreviated as CZ

rendering its black especially deep and mysterious

3-4 small ranging 15-20mm

Unakite is a granite composed of pink Feldspar and Epidote

Blue Kyanite 5x10-20mm Top Drill Teeth - 15-16 Inch 1109202148HR Green is the most commonKyanite 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