Where is the best place to sell unwanted jewelry to get the most money for what the jewelry is worth?

I have a 14k gold ring with 3 marquee shaped sapphire stones and 10 small round diamonds (diamond weight 1/3 carat). It's brand new, never worn, in original packaging. Where can I sell it to get the most money. (It was given to me from an ex, so getting rid of it). It cost approx $940. I know taking it to a pawn shop probably isn't a good idea right?