It is unfortunate the defect was not disclosed. If you have time to think about returning or using it, and is still in contemplating mode, don't make up your final decision yet. I know from my experience, I like restringing things time and time again, and this may prevent you from some options...
Tiffany is releasing new line of FWP to upcoming Gatsby movie. They look nice and design is substantial. I was really surprised how different Tiffany settings for pearls compare to other companies.