1925 Stone Mountain Old Commem Half Dollar 50c Grades Unc Details. One of the most Beloved Commemoratives. A perennial favorite and one of the most popular commemoratives - the Stone Mountain never dissapoints in its desirability. It celebrates the construction of a monument carved into The Stone Mountain outside of Atlanta, except the Monument was not completed till 1970 some 45 years after is minting. The original designer of the monument was discharged after a falling out and went on to create Mount Rushmore. When Examining a Stone Mountain Commemorative examine General Lee’s elbow and the eagle’s breast for the first signs of wear.