What is the difference between 2D and 3D?

2D crystal image are engraved reproduction of picture inside glass. The image is suspended inside the glass; the image and its reverse are visible. The image will never deteriorate or fade; etched into the crystal forever. 3D crystal images are three dimentional portraits created from two-dimensional photographs. Our computer software adds depth to the subject's facial features to create profiles of the face. All background are removed so that the focus is on the 3D reproduction of the individual engraved in our crystal.