What is Olymic 2010 medal made of?

The Olympic medals are designed especially for each individual Olympic Games by the host city's organizing committee. Each medal must be at least three millimeters thick and 60 millimeters in diameter. Also, the gold and silver Olympic medals must be made out of 92.5 percent silver, with the gold medal covered in six grams of gold. info taken from: http://history1900s.about.com/od/greateventsofthecentury/a/olympicfacts.htm