Jewlery and Fur? for bringing with you or for buying there? There are a few of the stores you might find in the Carribbean that are actually cruise line owned (like Little Switzerland and Columiban Emeralds). Either I never saw furriers there and come to think of it, we had 80 degree weather on our cruise and I never saw anyone wearing any. It's a Country Club CASUAL cruise.
Editing to add that while this is a 6 star line, it's a jeans, tshirts and flannel in the day with sweatshirts in the glaciers type of cruise. At night, a nice outfit from Chico's is more the norm. I don't recall any fur coats on this cruise whatsoever.