Diamond Key to Her Heart Pendant-Necklace in Sterling Silver on an 18" Chain 1 Genuine Diamond 18" Sterling Chain Key Measures just under 1 1/2 inches including the bale, the key itself is 1 1/4 inch. All of our diamond suppliers and MLG state that to the best or their/our knowledge that all of our diamonds are conflict free. You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it! 1 Genuine Diamond 18&#034; Sterling Chain Key Measures just under 1 1/2 inches including the bale, the key itself is 1 1/4 inch. All of our diamond suppliers and MLG state that to the best or their/our knowledge that all of our diamonds are conflict free.