My jeweler has a 1.50 round stone in the same specs as my 1.21. Will find out the extra cost tomorrow if I choose to make the switch. They will buy back the original stone for exact price I paid for it in 2007. Very intriqued. Anyone want to guess the amount of money I will need to come up with if I make it a go? I'm guessing near $4000 but really have no clue! I will update this thread tomorrow afternoon.