What is the chemical symbol for gold and how much does a gold medal weigh?

For the 2008 Beijing Olympics medals were 70mm in diameter and 6mm thick with the front showing a winged figure of victory and the back a Beijing Olympics symbol surrounded by an inset jade circle. They weigh approximately 250 grams. They are not actually pure gold but rather silver coated in no less than 6 grams of gold giving them an actual make up of 244 grams of silver and 6 grams of gold, roughly

The chemical symbol for gold is Au