Kyanite 3-5mm Graduated Faceted Rondelle - 15-16 Inch high-end-collar and can be red to

and can be red to reddish brown

Malachite is a copper carbonate with a bright green color and dark green banding

Astrophyllite is a very rare

as a gemstone that is cut into many shapes and often given a high polish

Kyanite 3-5mm Graduated Faceted Rondelle - 15-16 Inch high-end-collar and can be red toKyanite 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