<P> Olympic Gold medals are required to be made from at least 92.5% silver, and must contain a minimum of 6 grams of gold . All Olympic medals must be at least 60mm in diameter and 3mm thick . Minting the medals is the responsibility of the Olympic host . From 1928 through 1968 the design was always the same: the obverse showed a generic design by Florentine artist Giuseppe Cassioli of Greek goddess Nike with Rome's Colloseum in the background and text naming the host city; the reverse showed another generic design of Nike saluting an Olympic champion . </P> <P> From the 1972 Summer Olympics through 2000, Cassioli's design (or a slight modification) remained on the obverse with a custom design by the host city on the reverse . Noting that Cassioli's design showed a Roman amphitheater for what originally were Greek games, a new obverse design was commissioned for the 2004 Summer Olympics in Athens . For the 2008 Beijing Olympics medals had a diameter of 70mm and were 6mm thick, with the front displaying a winged figure of victory and the back showed a Beijing Olympics symbol surrounded by an inset jade circle . </P> <P> Winter Olympics medals have been of more varied design . The silver and bronze medals have always borne the same designs . </P> <P> The award of a gold medal, often coupled with the award of silver and bronze medals to the next place finishers, has been adopted in other sports competitions and in other competitive fields, such as music and writing, as well as some competitive games . Typically bronze medals are awarded only to third place, but in some contests there is some variety, such as International barbershop music contests where bronze medals are awarded for third, fourth, and fifth place . </P>

Weight of a gold medal in asian games