ZilverPassion Stacking Ring Round 4mm Opal/Pink Opal in Sterling Silver, October Birthstone (Size 2,3,4,5,6,7,8,9,10,11,12,13,14,15) FREE Jewelry Gift Bag 925 Sterling Silver, Nickel Free 1.5mm Band width Wear alone or Stacked with others Opal : October Birthstone