Friday, August 3 Olympic Fun Fact: The last year that Olympic gold medals were made out of solid gold was 1912. The current standard for a gold medal is that it must be at least 92.5% silver and plated with a minimum of 6 grams of gold. Minting the Olympic medals is the responsibility of the host city. XXX Summer Olympics (NBC 8pm) From London. Swimming, finals: men's 100m butterfly, men's 50m freestyle, women's ...