I am bearing in mind getting my engagement ring diamond which is a cushion cut reset in a corona setting. I am kind of worried to do it yet know at some point that I will want to improve my diamond to be a bit bigger. I’ve spoken to my fiancé about this and he is reasonable with it. So I guess my query would be reset with my diamond now, or wait till I get the somewhat bigger diamond I am lusting after and then go for corona?