Sterling Silver Gemstone Earrings 30 Day Easy Returns. Jewelry Gift Box Included .925 Sterling Silver Natural White Topaz stones are irradiated and heat treated to turn them into various shades of blue. This process is safe and permanent. You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it! All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free.