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 ...

The composition was primarily copper surrounding a silver center. Not only do these unique qualities add to its value, but they are compounded by the coin having a special strike from a pattern ...

A recent study by Dr. Ignacio Montero-Ruiz and his colleagues examined the provenance of ancient copper artifacts discovered on the Island of Ibo off Mozambique's coast. The study, published in Azania ...