I got married (for first time) in my early 40s and my DH got me a Tiffany's .75 ct G, VS2 RB, (think this is the "lowest", that T diamonds go). I like it, it is lovely but I am frankly bored with it and want to upgrade. Took it to T's with the cert to see what they cd do, but they want to see a receipt because DH who is Swiss bought it in Tiffany's Zurich. Somebody told me if you want to upgrade at T's you have to spend double of what you originally spent! I am not that crazy about T's rings, although the cut of a T diamond is superb, as I have another beautiful ring (1.90 ct Emerald cut F/VS2 with two .60 perfectly matched sapphires on the sides) that was remade from my mother's ring, and it doesn't matter where I am, I get comments, including from the T salespeople when I brought in my ering. I have found wonderful looking diamonds on jamesallen and whiteflash. Took that T ring to two independent jewelers I know and they will give me ~3,000 for the T ring as a trade. Found a superb 1.25 H/VS1 in a beautiful setting for $8500 at one of the independents, I don't know though. Thanks all for reading my first post!