August gold fell $9.30, or 0.6 percent, to $1,579.80 on the Comex division of the New York Mercantile Exchange.
Silver prices also dropped, with September silver at $26.88, down 56 cents.
The euro was $1.2257 late Tuesday from $1.2249 late Monday. Against the yen, the dollar fell to 79.32 yen from 79.43 yen.
The British pound was $1.5517 from $1.5527.
The Intercontinental Exchange Dollar Index was slightly higher at 83.36 from Monday's 83.35.