The London 2012 Olympic medals weigh 375-400g, are 85mm in diameter and 7mm thick.
The gold medal is made up of 92.5% silver and 1.34% gold, with the remainder copper (a minimum of 6g of gold).
The silver medal is made up of 92.5% silver, with the remainder copper.
The bronze medal is made up of 97.0% copper, 2.5% zinc and 0.5% tin.
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