Dinosaur Keychain Keyring Cut In A US Dime. Dinosaur T. Rex keychain cut into a US dime coin. FINISH: All of my coins are completely finished using a multi-step process of burnishing, polishing and cleaning. CONDITION: These are circulated, recycled coins. Although each coin is finished and polished, there may be minor imperfections from having been in circulation. Gift box included. Coin dates may be different from that shown.