Gold Medal is 92.5% Silver.
Adam Rifkin stashed this in Olympics!
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What's in a gold medal? 92.5% Silver, 6.16% Copper, 1.34% Gold.
The World Gold Council says:
The International Olympic Committee stipulates that each gold medal must have a minimum silver content of 92.5% and at least six grams of gold. At the London 2012 Games, copper has been used as the third ingredient. The Beijing Olympic medals in 2008 contained jade, which signifies virtue in Chinese culture.
Wow, I had no idea.