This deal has ended.
Just in time for Valentine's Day, we have a rare coupon for 10% off Blue Nile valid through 2/5. Blue Nile is the largest online jeweler, having sold over 50,000 engagement rings. They buy diamonds through the same wholesalers that Tiffany's does, but can sell for 35% less. As always, Free FedEx, no sales tax and fully guaranteed 30-day return policy.