Apatite can exhibit chatoyancy — an uncommon optical phenomenon in some stones that resembles the light reflection of a cat’s eye
discovered a way to improve the quality of turquoise in the 1980's
African Jade is a complex Calcium Aluminum Silicate and is a Nephrite Jade
initially as tools because of its hardness
intricate patterns of minute black flecks
Kyanite Multi 8mm Round - 15-16 Inch Zirconia Apatite can exhibit chatoyancy —Kyanite 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