High Quality Content by WIKIPEDIA articles! Osmiridium, also called iridosmium, is a natural alloy of osmium and iridium, with traces of other platinum group metals, found naturally or man-made. Osmiridium contains about 50% iridium, while iridosmium contains about 70% iridium.Osmiridium is very rare, but it can be found in mines of other platinum group metals. One very productive mine operated at Lake Pedder near Tyenna in Tasmania during the second world war with the ore shipped out by railway from Maydena. The site of the mine is now totally reclaimed by dense natural bush. It was once one of the world's major producers of this rare metal, and the osmiridium was mostly recovered found in shallow alluvial workings

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