Fla. Sen. Rubio introduces bill to make Olympic prizes tax-exempt.

[muriel_volestrangler]

23. Been like that for nearly 100 years

The last Olympic gold medal that was actually made from gold was awarded in 1912. So, if Olympic gold medals aren't gold, then what are they? The specific composition and design of Olympic medals is determined by the host city's organizing committee. However, certain standards must be maintained:

Gold and silver medals are 92.5% silver.

Gold medals must be plated with at least 6 grams of gold.

All Olympic medals must be at least 3 mm thick and at least 60 mm in diameter.

Bronze medals are bronze, an alloy of copper and usually tin. It's worth noting that gold, silver, and bronze medals have not always been awarded. At the 1896 Olympic Games, the winners were awarded silver medals, whiile the runners-up got bronze medals. The winners at the 1900 Olympics received trophies or cups instead of medals. The custom of awarding gold, silver, and bronze medals started at the 1904 Olympics. After the 1912 Olympics the gold medals have been gilded silver rather than real gold.

http://chemistry.about.com/od/metalsalloys/f/what_are_olympic_medals_made_of.htm