Osmiridium is an alloy of osmium and iridium with a trace of platinum and rhodium, found naturally or man-made.

Occurrence

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Osmiridium is very rare, but it can be found in mines of other platinum group metals. It can be isolated by adding a piece to aqua regia, which has the ability to dissolve gold and platinum but not osmiridium.

Uses

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Osmiridium is used in making fountain pen nibs, surgical equipment, and other high-wear functions.

References

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• ^* - osmiridium: Definition and Much More From Answers.com

Precious metal alloys