Exhibition of Diavik-mined giant, uncut Foxfire diamond extended

Australia's Highlands Pacific and China Metallurgical Group can now power on their $1.5 billion Ramu nickel project in Papua New Guinea after a judge threw out the environmental challenge to the project's planned deep-sea disposal of tailings after an 18-month legal battle. Ramu is situated on Papua New Guinea's north-west coast and is completely built – annual production is estimated at more than 31,000 tonnes of nickel and 3,300 tonnes of cobalt for over 20 years.

A landmark victory in the Federal Court looks set to give unions more power to bargain on behalf of workers at Rio Tinto and BHP Billiton iron ore operations in the Pilbara. The full bench of the court has ruled that a non-union collective agreement covering workers in Rio Tinto's operations was invalid. Yesterday's decision casts doubt on similar agreements at BHP and other operations in the mining region, involving thousands of workers.

The bubble that is keeping iron ore prices at historic highs may be about to burst, and when it does, iron ore giant Fortescue Minerals will still be making money, the company's new CEO predicts.

Australia's Whitehaven Coal reported a 48 percent rise in equity coal output in the June quarter versus the same period a year ago and said it expects to show a fiscal 2011 underlying net profit of A$70 million before significant items.

Macarthur Coal, the mining group that is the target of a $4.7 billion takeover bid by US energy company Peabody Energy and steel giant ArcelorMittal, has suffered a steep slide in sales a result of wet weather. Macarthur's sales in the June quarter tumbled 22.5%, with its annual sales down 26.5% to 3.9 million tonnes. Peabody and Arcelor have sweetened the deal following a couple of failed attempts in the past three years and is set to complete due diligence at the end of the week.

Beijing has issued a veiled threat to Australia's long-term economic future. It has vowed to break the power of the big mining companies by sourcing 50 per cent of its iron ore imports from Chinese-invested companies.

Bloomberg reports BHP workers in Chile voted Sunday to extend their strike at the world’s largest copper mine. Stoppages at BHP’s Australian coal operations may resume this week. Thirty thousand South African coal mine workers including Anglo American and Xstrata employees walked off the job Sunday and may be joined by 160,000 gold industry workers. Strikes that started over the weekend are impacting output from mines of diamond giant De Beers. Workers are seeking a larger slice as global producers report record earnings: Melbourne-based BHP, the world’s biggest mining company, is expected to report full-year profits of $22.5 billion next month, almost double 2010’s net income. Xstrata may report record 2011 profit of $7.3 billion and Anglo American $7.4 billion, estimates show.

A large Queensland pastoral farm used for wagyu cattle breeding is set to become a coal mine after Australian Agricultural Company (AAC) agreed to sell a property to mining company Xstrata. The global miner will pay $21.6 million cash for the 17,474-hectare Meteor Downs property without any cattle or machinery. Image is from Cyrille BERNIZET

The largest union at Chile's Escondida copper mine has voted to "indefinitely" extend a strike at the mine, which is controlled by BHP Billiton. Members of the 2350-strong Escondida Mine Workers Union No 1 "unanimously voted" to extend the work stoppage, which began on Thursday night and was initially planned to end 24 hours later at 8pm on Friday, union leader Jose Vidal said.