BUZZ-Australia's Metals & Mining Index down as gold and iron ore prices fall
** ASX 300 Metals & Mining Index slumps as much as 2.4 pct to 2,052.4 points, with 24 out of 33 constituents down in early trading
** Gold miners OceanaGold Corp, Alacer Gold Corp and Evolution Mining Ltd are the biggest percentage losers on the index, along with iron ore miners BHP Billiton Ltd and South32 Ltd
** Spot gold slips 0.3 pct to $1,074
** Iron ore for immediate delivery to China's Tianjin port .IO62-CNI=SI dropped 1.5 percent to $45.10 a tonne on Thursday, as per data from The Steel Index
** has fallen 20.5 pct this year, as of Friday's close
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