Get 10% off your order at Blue Nile via code AEXP11 when you pay with your American Express card. Better yet, they are currently offering the pictured Everlasting Hearts Necklace in Sterling Silver, regularly $75, for $35 with any purchase (it will appear in-cart). With the 10% off, it drops to $31.50. Check out the Graduated Bead Necklace, which drops from $110 to $99, and the Freshwater Cultured Pearl Solitaire Necklace, which lowers from $150 to $135. Plus, FedEx Priority overnight shipping is free. Note that this is not valid on loose diamonds and "build your own" engagement rings.