The Olympic gold medals are mostly made of silver, not gold. Only six grams, or 0.19 ounce, of gold is required to coat the medal. The medal itself is made of 92.5 per cent or 550 grams of pure silver. The medals are usually circular with a diameter of a minimum of 60 mm and a thickness of a minimum of
3 mm. These specifications are as per the Olympic Charter. The last time a pure gold medal was awarded in the 1912 Olympics in Sweden.
