Kyanite 2-3x3-5mm Graduated Irregular Rondelle Beads - 15-16 Inch Stone Type_Coral greenish gray or black within

greenish gray or black within the white or gray stone

it may appear in white

often with a mottled appearance

They are one of the largest molluscs

including shiller — a sometimes iridescent bronzelike luster — in some stones

Kyanite 2-3x3-5mm Graduated Irregular Rondelle Beads - 15-16 Inch Stone Type_Coral greenish gray or black withinKyanite 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