A finish on a metal between a matte finish and a brilliant one. This semi-glossy finish is done by making shallow parallel lines on the surface of the metal, reducing its reflectivity. Found on http://www.encyclo.co.uk/local/22290
One with a surface more closely resembling roman gold than matte and very close to regular brilliant-proofs. Most common examples of Satin finishes include some 1921 and 1922 Peace dollars. Found on https://www.encyclo.co.uk/local/22578