Quite a number of these rather poor fakes floating around out there. Quite easy to spot as pretty much always have that same dark gray color, granular surfaces, and soft features. In hand, however, they are really easy as always well underweight. Here the 1858 is 8.6g and the 1876 is 9.88g. Both are non-magnetic and non-silver.
1858-O and 1876 Liberty
Seated half dollars - cast fakes

