The 2016 W Mercury Dime Centennial Gold Coin is the only official gold dime minted by the US mint. It contains 0.1000 troy oz. of 24 Karat gold, with a diameter of 16.50 mm and a thickness of 1.19 mm. It features the old Winged Liberty design on the front and an olive branch and a Roman fasces symbolizing peace and military readiness on the back.