 Reason number 52 to choose Diamonds Direct over any other jeweler. Only Diamonds Direct gives you a 110% diamond upgrade guarantee. Let us explain. If you buy a diamond at Diamonds Direct today and decide in the future you want to upgrade to a larger diamond, Diamonds Direct will give you 110% of your original purchase price toward the new stone. For example, let's say you bought her a $5,000 diamond last year, but now she wants to upgrade