I have a 1851 Indian Head $1 coin how can I know if it's a copy??

Question

I have an 1851 Indian Head $1 coin and I want to find out if it's a copy. All of the ones that I have seen on line that are not real say "COPY" on either side. My coin does not have the word "copy" on it. Does anybody know the exact weight of a real 1851 dollar coin?? this one weighs 18.62 grams

Answer 1

18.62 grams for a US $1 gold coin is way too heavy. Did you shift a decimal point? Correct weight should be 1.67 grams or thereabouts.