Silver prices settled up 33 cents to $18.77 in tandem with gold while copper closed down 9 cents to $2.90. Mining stocks, a more risky but more profitable way to invest in gold , were rising higher. AngloGold Ashanti ( AU) was rising more than 2% to $44.89 while Yamana Gold ( AUY) were adding 2.38% to $10.81. Other gold miners Gold Fields ( GFI) and Randgold ( GOLD) closed at $14.22 and $93.65, respectively. -- Written by Alix Steel in New York.