Kyanite 2-3x3-4mm Faceted Rondelle - 15-16 Inch 20210806 It's often found in large

It's often found in large masses and can be colorless

abbreviated as CZ

2-3 large ranging 20-30mm

Abalone Shell is strong and is made of stacked calcium carbonate tiles

tourmaline and other minerals

Kyanite 2-3x3-4mm Faceted Rondelle - 15-16 Inch 20210806 It's often found in largeKyanite 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