Some diamonds were given the name of cushion cut (or Old Mine Cut) and these special diamonds usually have facets that are larger and they have rounded corners. These two special features increase the sparkle from them when light is reflected.

When it comes to purchasing cushion cut diamonds loose, each diamond needs to be checked to ensure that is shaped as a square or a rectangle and that the corners are rounded. Some jewelers specifically look for the shape of a pillow when buying lots of loose cushion shaped diamonds.