Question

What change happened to make the silver-looking coin look gold?

Answer 1

There could be a few possible explanations for this question, but one possible answer is that the silver-looking coin was coated with a thin layer of gold through a process called electroplating. Electroplating is the process of using an electrical current to deposit a thin layer of metal onto a conductive object. In this case, the silver coin was likely made of a conductive material such as copper or nickel, and a thin layer of gold was deposited onto the surface through electroplating. This would give the coin a gold-colored appearance while still maintaining its original structure and weight.