Gold coins : Gold coins are typically produced as either 90 % gold ( e.g. with pre-1933 US coins ) , or 22 carat ( 91.66 % ) gold ( e.g. current collectible coins and Krugerrands ) , with copper and silver making up the remaining weight in each case .
Gold coins : Gold coins are typically produced as either 90 % gold ( e.g. with pre-1933 US coins ) , or 22 carat ( 92 % ) gold ( e.g. current collectible coins and Krugerrands ) , with copper and silver making up the remaining weight in each case .