... of XDGems are waiting for you. Gemstones Specification Material:Cubic Zirconia(aka CZ), Corundum, Ruby, Sapphire, Spinel, Glass ... 180mmColor:white, black, pink, garnet, amethyst, blue, brown, green, olive, peridot, yellow, champagne, coffee, aquamarine, tanzanite, ... and economically important competitor for diamonds since 1976. Cubic zirconia is crystallographically isometric, an important attribute of ...