Gold futures turned lower on Friday, September 7, retreating from the highest level in nearly six months reached the prior day. Bullion with December contract erased 0.5 per cent, to $1,697.10 per ounce. Elsewhere in the metals complex, prices were mixed. December silver lost 1.05 per cent to $32.335 per ounce, while copper for the same month jumped 1.04 per cent to $3.580 per pound.