chefjeff said:Experiment done already...
Whoops!...Second flip of a real silver 1 oz coin I just bought last week (brand new) and it left a definite mark about 1/4 inch long. Jeff Livingston
Jeff, I hope you're not flipping American Silver Eagles. The silver is soft and the metal gets dinged easily. These coins loose their value if they are not kept in Brilliant Uncirculated condition.