My SO and I are looking to buy the diamond for my engagement ring, hopefully soon, hopefully from OWD. Looking for an antique cushion, and we may or may not have OWD make the setting. We're total jewelry novices, and while I've done some research on stones, I don't really know what to do besides purchase it. What are the next steps? Appraisal? Any information would be greatly appreciated! Also, we have a modest budget of 4k-7k, if that makes a difference for the advice. Thanks!