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