Gold prices fell on Thursday, pressured by a stronger USD and concerns triggered by elevated oil prices. Spot gold declined USD45.8, or 1%, to USD4,694.1 per ounce.Gold futures for June delivery fell USD29, or 0.6%, to USD4,724 per ounce.Silver futures for May delivery dropped 3.1% to USD75.504 per ounce.Copper futures for May d...