so I''m working on a pendant , and I don''t want to spend a fortune on settings... so I found a few stuller settings, but size is a little tricky are these precast and sold as is ? or if I have a shape of stone do they make them to fit? have you had experience with stuller semi mounts? sorry of full of lots of questions today as I have two different shaped gem contemplating of buying and one of them is rather large...