Gold gains before the Fourth NEW YORK, July 3 (UPI) -- Gold prices rebounded on the Comex division of the New York Mercantile Exchange Tuesday, adding $20.30 to settle at $1,618 per troy ounce. Silver gained 72 cents to close at $28.25 per troy ounce. The dollar index was flat, dropping 0.1 percent to 81.78 on the International Exchange. Gold, essentially, made gains due to pre-holiday move to safety with the Fourth of July holiday falling in the middle of the week this year. The euro rose to $1.2607 from Monday's $1.2576. Against the yen, the dollar rose to 79.82 yen from 79.51 yen. The British pound held unchanged at $1.5693. The dollar fell to 1.0123 Canadian dollars from 1.0172 Canadian.