Goldbacks are made of 24-karat gold foil, which is laminated onto a sturdy polyester film. This means that they are durable and long-lasting, potentially making them an excellent investment for ...

In the past, this was way too small, but today it is easy to do. Then, you can add a 100 milligram “gold foil note,” which actually has 100mg of gold impregnated in the plastic. These would be ...