The Pearl Factory, Maui
The Pearl Factory has booths all through the Hawaiian islands. There is a big bucket of oysters you can choose from. There is a ceremonial tapping of the oyster shell and everyone shouts "ALOHA" before opening the pearl for good luck. The oyster is opened in front of you and they guarantee at least one pearl. Sometimes you get twins when the oyster is opened and occasional one of the rare blue/black or purple pearls rather than white or yellow. Pearls vary in size.
Kind of a cool gift for people back home. Each oyster is approx $13.95 ( not too expensive) - but where they make their money is getting you to have it set in anything from earring to rings to necklaces. Price has gone up since I was little - used to be $4.99/oyster! Fun thing to do. Really fun for kids and adults alike.
What to buy: Pearls, jewelry
What to pay: $13.99 and up