Gold gained for the fifth consecutive trading session, adding $34.90 to $1,740.50.
Gold is finding support from the weaker dollar and from anticipation of a third round of quantitative easing, which many expect the U.S. Federal Reserve to announce Thursday.
Silver also rose, gaining $1.06 to $33.69 per ounce.
The Canadian dollar rose against the greenback to 97.85 cents and the British pound rose to $1.6009. The euro reached $1.2816, while the dollar fell to 78.24 yen.