Answer:
I'll take a stab at answering your comment. Although, for future reference this is a website where you are supposed to ask questions, and there is no way to answer what you said.
Although, I will try,
The sound of a clad coins and a silver coin sound different when they hit a solid surface. Silver will kind of make a "tingy" sound, where as clad coins make more of a dull sound when they fall on a table or something similar.