until the 17th century Crystal Quartz was believed to be permanently frozen water
which tends to be a strong blue color
rather a feldspar-rich igneous rock
It is also thought to offer special protection to the emotionally sensitive
Green Kyanite 5-10x22-30mm Teeth - 15-16 Inch Melody Stone until the 17th century CrystalKyanite 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