	kidston says higher net reflects gold sale rise kidston gold mines ltd attributed the rise in net profit to higher prices and an increase in gold sales to ounces from ounces in the placer development ltd offshoot which operates australia s largest gold mine in north queensland earlier reported net profit rose to mln dlrs from mln in the period of months from the start of production sales of silver also rose to ounces from kidston said in a statement it will spend about mln dlrs to upgrade its mill grinding circuit to a mill ball mill crushing circuit to boost output by pct from end reuter 
