What kind of jewelry are you thinking of? Bracelet, necklace, earrings, hair pin/accessory, rings, anklets?
Here are a few of examples of jewelry that specifically have flamenco in their title:
Amazon.com: Amethyst earrings, 'Flamenco Dancers': Jewelry & Watches http://laffbyrd.tripod.com/sitebuild...menco_rose.jpg
If you're looking for the type of jewelry that flamenco dancers wear, go to your local library (or images.google.com) and look up pictures of flamenco dancing/dancers (they may also be in Spain books) to get ideas of what professionals go with.
If it's more spanish based designs you're looking for, here are some good Google image searches:
spain pattern - Google Image Search Google Image Result for http://tguitars.home.texas.net/images/1957%20Hernandez%20y%20Aguado%20Blackshear%20Desig n%202.jpg flamenco jewelry - Google Image Search
Best of luck to you and respond if these don't help!