Xstrata Nickel Australasia, based in Perth, Western Australia, is a high-grade nickel sulphide producer. Operations commenced at Cosmos with the development of the deposit in 1999, and it achieved first production of nickel concentrate in April 2000. The operation was placed in care and maintenance in September 2012 in response to adverse market conditions.

Evaluation of the newly-discovered Odysseus, Odysseus North and Odysseus Massive deposits at Cosmos continues, with a view to completing a feasibility study by the first quarter of 2014 to enable an investment decision, dependent upon market conditions.

Processing of ore at Cosmos is carried out using a conventional nickel sulphide flotation plant to upgrade the ore to around 20% nickel in the final concentrate product.