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It recorded a rise of nine per cent - or 2.1 million tonnes - during the three-month period which compared to the same timeframe in 2008, taking the total amount produced to 25.6 million tonnes.
However, the news was not enough to prevent the firm's shares falling during afternoon trading on the stock market, with the price dropping 1.56 per cent to 1,011p in London at 15:15 BST.
According to Reuters, coal is the most profitable material for the business, followed by copper, where output dropped by ten per cent.
Nickel levels remained largely unchanged, while zinc production climbed ten per cent during the quarter.
Xstrata noted in the trading update that its "operating and financial performance continues to be strong", in the period from July 1st, adding that it is in a "robust" financial position.
