I agree with Island Gem, we have purchased quite a few pieces in SXM and I love them all. Prices were MUCH better in SXM than in the US.
We have used Sam Karani , wife Debbie, at the cruise terminal store, at Kay's for years.
We also have heard nothing but high praise for DK Gems and Jeff is definitely the go to person there.
If you have her ring size, definitely get in SXM. Buy up a half size, easy to take down a size..
I have purchased many pieces for friends and the appraisal value in US is ALWAYS higher