By Tejaswi Marthi May 25 (Reuters) - Australian shares closed at a two-week high on Tuesday, marking a positive finish for a fourth straight session, as heavyweight miners gained on firmer iron ore prices and financial stocks tracked U.S. peers higher. The Australian metals and mining index .AXMM rose about 1.2%, snapping a four-session losing streak, as iron ore futures in Asia inched higher amid China's warning against commodity price manipulation and speculative trading. On the downside, the gold index .AXGD slipped over 0.6% as bullion prices fell on upbeat risk sentiment after inflation worries ebbed.