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 ...

A long time ago, I was a professional numismatist – that is, I was paid to make judgements on coin investments.

Your coin stash could be hiding a little gem without you even realising. This 50p coin features an 'unusual mark' and one ...

An expert has told Brits to “always check both sides” of a common coin in case it features a rare error. If your £2 coin features this specific mistake it could be worth as much as £1,000.

So, go ahead, grab that and let the treasure hunt begin because, turns out, you might have a quarter in there that is worth $10,000.

Insofar as many of us have bits of gold jewelry or a few old silver coins laying around, selling it is almost like free money. Still, the numismatic (i.e., collector's) value of some coins still ...