Birthstones - reimagined; redefined. We're bringing back birthstones with a truly unique way of wearing them. Each pendant is handcrafted to order in our Dumbo, Brooklyn studio with your chosen birthstone and shell size. Due to the natural shape and color of each shell, every piece is one of a kind. Materials: High-polished natural shell, 40-inch silk cord, 18K gold-plated hardware with e-coating, and your chosen cubic zirconia birthstone. Shell Dimensions: Small: 0.6 - 0.8 inches Medium: 1 - 1.2 inches Large: 1.2 - 1.6 inches Production: Made to order. Ships within 2-5 business days. Want to build your own? Explore our mix-and-match charms and bases here and save 20% on 2+ charms.