Precious Gemstones : Amethyst, Andalusite, Aquamarine, Beryl, Black Opal, Chrysoberyl Cats-eye, Chrysoberyl Alexandrite, Chrysoprase, Corundum, Demantoids, Diamonds, Emeralds, Garnets, Jadeite, Lapis Lazuli, Nephrite, Opal, Peridot, Ruby, Sapphire, tanzanite, Precious Topaz, Tourmaline, Turquoise, Zircon, Zoisite.