Swarovski jewelry quality rhinestone in a cube shape, lots of facets for maximum sparkle. This is an absolutely gorgeous stone that is completely out of production at this time. The back has a flat spot so it would make a great accent piece! This is all we can get so when they are gone, they are gone. Colors as shown in photo. The back is shown on the left so you can see what it looks like the rest is the color that you can see to the sides (including the top).