Depends where you shop and when. High season with Cruise ships in dock tend to keep prices on the up side.

Shop several jewelry outlets or more. Compare what you like, mainly as to weight.

Youll get other suggestions but Ive had great buys at Kays, Rams, Noble jewelers to name a few.

You can haggle with them somewhat.
Little Switzerland, Shivas, Columbian Emeralds, and a few more wont negotiate or bargain.
Happy Hunting