Depending on where you are there are bespoke jewelers that can take industrially made "perfect" stones including diamonds and emeralds and make rings to spec fo

Depending on where you are there are bespoke jewelers that can take industrially made "perfect" stones including diamonds and emeralds and make rings to spec for like 500 USD equivalent or less. In the US, the renaissance fair crowd almost always has a bunch of jewelers who's work you can preview. Gems and workable gold allows are not that expensive.