The only extra cost for custom pieces is the deposit cost for 3D previews. We offer the first 3D preview free of charge, but your second preview will cost you $100 USD. Any additional 3D preview is $50 USD. To avoid additional 3D previews. please be as specific as possible with your request. The amount paid for the 3D previews is later deducted from your final purchase order. You will receive a special link with a deposit fee that you can purchase once needed, within your conversation with our customer service. If you want to see an existing ring with another colored gemstone, we are more than happy to make a photoshopped mock-up of how the ring would look like. For more detailed customizations, deposits for 3D previews are needed.