Newcrest Mining Ltd is considering bringing in a partner for the O'Callaghans tungsten deposit near its flagship Telfer gold mine in Western Australia. "We've got a large tungsten deposit that we're quite confident will be easy to mine," chief executive Ian Smith told journalists on Friday after the miner posted a solid rise in first half net profit. "If some metallurgical test work comes in as positively as first indications would suggest, we will pursue how we go about working this deposit in a way that maybe another partner can get involved to take the tungsten from O'Callaghans off our hands. "I don't think we see ourselves as people who want to participate fully in the marketing of tungsten." Mr Smith said 80 per cent of the global tungsten market was controlled by China.