Instead of opting for the cliche “key to your heart” type of pendant, Tiffany is offering the lock itself as a beautiful pendant for Valentine’s Day. This Hearts Lock Pendant is made of 18K white gold (also available in 18K yellow gold) and features a heart-shaped set of round brilliant-cut diamonds embedded in the front of the lock. The total weight of the diamonds is .12-carats. The lock is suspended from a 16-in. long white gold chain. Price: $1,500.