<Li> Silver (or another grey metal, e.g., steel) </Li> <P> Occasionally, Platinum medals can be awarded . </P> <P> These metals designate the first three Ages of Man in Greek mythology: the Golden Age, when men lived among the gods, the Silver Age, where youth lasted a hundred years, and the Bronze Age, the era of heroes . </P> <P> The custom of awarding the sequence of gold, silver, and bronze medals for the first three highest achievers dates from at least the 18th century, with the National Association of Amateur Athletes in the United States awarding such medals as early as 1884 . </P>

Where does the gold come from for the olympics