The $25 Half-Ounce American Gold Eagle was designed by Augustus Saint-Gaudens (obverse) and Miley Busiek (reverse) until its redesign in 2021. Weighing 16.966 grams and composed of .9167 gold, .03 Silver, .0533 copper (netting 1/2oz gold). These coins are 27mm in diameter, have reeded edges, and are produced in an Uncirculated and Proof version.