"Little America" shop in St. Thomas for jewelry, souveniers, shirts, etc. NOT the one at the Havensight Pier but the one at 21 Main Street, past all the "fancy" shops.
The owner, Parminder Singh, and his lovely wife, Pinky, and their manager, Carmel, have been friends of mine since I met them in 1993. I've bought several pieces of wonderful gold jewelry from them and they always have the best prices in St. Thomas. They have tanzanite, silver, stones and gems - they are very kind people and not hard sell.
Tell them "Carol from Michigan" sent you and you might get a better deal!
In St. Maarten, Grand Jewelers is a favorite of mine. Sunny Mahtani is a charming young man who "seduces" your wrist when he puts a bracelet on. He is very cute, honest, has great prices, and is great fun. Grand Jewelers is on the main street of St. Maarten - forgot the name. Tell them I sent you - might be worth a buck or two!