Although lockets aren't as popular as they once were, I find them charming and sentimental. This flower engraved gold locket is one I found at an antiques market many years ago.
Queen Elizabeth the first wore a locket ring with portraits of her mother and herself inside.
Mary Queen of Scotts had the Penicuik Locket that she is thought to have given to a servant before her execution.
Today you can find many lovely lockets for sale, especially on Etsy. This compass locket is from the Etsy shop Birdz n Beez.