I just purchased a Vatche Royal Crown setting from a local B&M and am having it set. My diamond is just over 1 carat. The tag on the setting said 925 RC, which I found out was for a .75 stone. Is it possible that the jewelrer might set my 1 carat diamond in the RC setting for a .75 stone (the 925 model)? Would the diamond fit in it? I want it set in the 1.0 setting (921 model) and I called the jewelrer to advise him of that but I can''t be too sure that is what is going to happen. However, I noticed that Superbcert sells the RC 925 for .75, 1.0 and 1.5. I''m afraid I won''t be able to tell a difference once it''s set.