(CNN) — Looking at an X-ray film you might spot fractured bones or even floating foreign objects — but hidden within the film itself there is a tiny amount of silver. Now, The Royal Mint, the UK’s oldest company and official maker of British coins, is using that silver to create jewelry. To source the silver, it has teamed up with Betts Metals, a company based in Birmingham, England, that has recovered precious metals from waste for more than 250 years.