$125 an hour plus the material is the average cost around the United States and is standard. Let’s say a simple wedding band; adding a 3D CAD specialist can be a little more expensive. For example, for an engagement ring with 10 diamonds on each side, you can probably guess about $1300 for a design that has already been done up, and then you make adjustments using CAD software. This is just for a simple design. The price may increase for something with more diamonds or a more complex design.