Very attractive Black Onyx and Silver Bead Set sure to receive lots of compliments! Alternating onyx and silver beads with larger beads in the middle. Graduated strands are approximately 18″ at the shortest and 19″ at the longest. Drop earrings measure approximately 1 1/2″ long. 925 Sterling Silver Overlay. All the metal surfaces of our jewelry are covered with a clear coating for extra durability.