4 Shelly Accessories for Summer Beach Trips It's a boardwalk empire. Summer's hottest designer accessories — from bags to baubles — are chic as shell. Joseph Shin Rebecca de Ravenel Ophelia clip-on natural shell earrings. Katy Perry and Selena Gomez are fans of the brand; $325, matchesfashion.com. Devon Leigh Ammonite necklace wrapped in 24-karat foil; $690, devonleighdesign.com or 213-232-4706. Rebecca de Ravenel She Sells Seashells bag; $315, rebeccaderavenel.com. Anastasia Vitkina Clam shell and shagreen clutch with detachable chain strap. Rosario Dawson carried it to the CFDA Awards in New York; $1,000, modaoperandi.com.