Let me get this straight - the center slug on a SS is 6 - 10th of an ounce - equal to how many grams ?

The same measure is used for gold - so my $2.50 gold liberty would be ?? or an ounce in ?? Grams

Wife no longer wears the coin in a benzel so am going to sell - quick local dealer graded so was wondering when/if meatle value = nuesmaatic