The combination of "copper" and "penny" might not seem like the best formula for valuable coins considering that you can find higher denominations in gold and silver. But finding the right copper ...

The bronze and copper coins were originally minted in Rome. A diver stumbled across the find of a lifetime off the coast of Sardinia when a stray shiny item loosened itself from the sea grass below.

The Royal Mint has warned people who might consider melting down 1p and 2p copper coins to think again. With copper prices topping $9,000 a tonne, pre-1992 copper coinage is now worth twice its face ...