Hard to be blue after a day at the beach, but two strands of polished cobalt blue quartz capture the beauty of shore-filled style--especially paired with a vintage goldtone double-shell buckle clasp by Mimi DiNicola (c. 1986, dated).  Wear the shells at front center, at the side for an asymmetrical look, or around back to show off just the blue beads.  Approximately 18" long overall.