We are leading diamonds and engagement rings retailer, selling our stock from first hand, at the lowest prices in the market. We are online since 1997, so you can say we are veterans in terms of internet time. At Diamonds-USA. We guarantee that an enhanced diamond bought from us will not turn “un-enhanced” or “unfilled” in your lifetime. However, should anything of this nature happens by customer's mistake (putting open torch fire on the diamond at the jewelers), you can always send the stone back to us without any loss at your end.