It's used to used to mine iridium. The percentage of iridium found in the Earth is only four-tenths of a part per billion so you don't need heavy equipment to extract it as there is not much of it. Furthermore, wages are cheap.
Phew, i survived a 'restructure' that ocurred at work today. The GM 'restructured' his troops in qld yesterday and came down and did us in nsw today. The end result was 2 of the 5 of our section were told to leave by lunch. Not a good week but glad. I survived it so far. I guess l'll be running faster from now to pick up the slack. If you want to employ a smart, efficient girl that knows the legal issues in mining in the hunter valley area let me know.