The 1925 Stone Mountain Commemorative Half Dollar Z-146 is an circulated silver coin minted by the United States in 1925. This particular coin features the Stone Mountain variety and was struck in a business setting at the Philadelphia Mint. It has a fineness of 0.9 and is uncertified, making it a valuable addition to any coin collection. This commemorative coin was issued to celebrate the Stone Mountain Memorial Association and the dedication of the Stone Mountain Confederate Memorial.