what are the olympic gold medals made of
Gold medal Olympic Gold medals are required to be made from at least 92.5% silver, and must contain a minimum of 6 grams of gold.[6] All Olympic medals must be at least 60mm in diameter and 3mm thick.[6] 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.