Rio Tinto media release Web versionhttp://riotinto.msgfocus.com/q/1MtPh8cHBgBlfn/wv If you have problems viewing images in Outlook, please add us to your safe list http://riotinto.msgfocus.com/c/13nenOP9y6Hz268hcnCA6JlS 27 March 2012 Rio Tinto reviews options for future of its diamond business Click to download full pdf article Download pdf here http://riotinto.msgfocus.com/c/13nepRyVW3ictfe0JsWKdnDl Rio Tinto has begun a strategic review of its diamond business that will include exploring a range of options for potential divestment of its diamond interests. Rio Tinto operates three diamond mines, Argyle in Australia (100 per cent interest), Diavik in Canada (60 per cent interest), and Murowa in Zimbabwe (78 per cent interest), as well as Bunder, an advanced diamonds project in India (100 per cent interest). Harry Kenyon-Slaney, chief executive Diamonds & Minerals, said “We regularly review our businesses to ensure they remain aligned with Rio Tinto’s strategy of operating large, long-life, expandable assets. “The diamonds market outlook is very positive, with demand growing strongly and lack of new discoveries limiting supply.

We have a valuable, high quality diamonds business, but given its scale we are reviewing whether we can create more value through a different ownership structure. “This process may take some time.

We’re committed to keeping stakeholders informed about any key developments, and in the meantime are reassuring employees and the governments in the states and countries where we operate that it is very much business as usual.” About Rio Tinto Diamonds Rio Tinto operates a fully integrated diamonds business from exploration through to sales and marketing.

It is one of the world’s major diamond producers through its 100 per cent control of the Argyle mine in Australia, 60 per cent of the Diavik mine in Canada, a 78 per cent interest in the Murowa mine in Zimbabwe.

These three mines allow Rio Tinto to produce the full range of diamonds for all market segments.

Rio Tinto also has an advanced diamond project, Bunder, in India. Rio Tinto’s share of the production from its three operating diamond mines is sold through its sales and marketing headquarters in Antwerp, with representative offices in Mumbai, Hong Kong and New York.

It also operates a niche cutting and polishing factory in Perth for the rare pink diamonds from its Argyle mine.

Rio Tinto is a leading supporter of the Kimberley Process as well as a founding member of Responsible Jewellery Council.

Website: www.riotintodiamonds.com. About Rio Tinto Rio Tinto is a leading international mining group headquartered in the UK, combining Rio Tinto plc, a London and New York Stock Exchange listed company, and Rio Tinto Limited, which is listed on the Australian Securities Exchange. Rio Tintos business is finding, mining, and processing mineral resources.

Major products are aluminium, copper, diamonds, thermal and metallurgical coal, uranium, gold, industrial minerals (borax, titanium dioxide and salt) and iron ore.

Activities span the world and are strongly represented in Australia and North America with significant businesses in Asia, Europe, Africa and South America. Contacts: Media Relations, EMEA / Americas Illtud Harri Office: +44 (0) 20 7781 1152 Mobile: +44 (0) 7920 503 600 Tony Shaffer Office: +44 (0) 20 7781 1138 Mobile: +44 (0) 7920 041 003 Christina Mills Office: +44 (0) 20 7781 1154 Mobile: +44 (0) 7825 275 605 Media Relations, Australia / Asia David Luff Office: +61 (0) 3 9283 3620 Mobile: +61 (0) 419 850 205 Karen Halbert Office: +61 (0) 3 9283 3627 Mobile: +61 (0) 412 119 389 Bruce Tobin Office: +61 (0) 3 9283 3612 Mobile: +61 (0) 419 103 454 Media Relations, Canada Bryan Tucker Office: +1 (0) 514 848 8151 Mobile: +1 (0) 514 825 8319 Investor Relations, London Mark Shannon Office: +44 (0) 20 7781 1178 Mobile: +44 (0) 7917 576 597 David Ovington Office: +44 (0) 20 7781 2051 Mobile: +44 (0) 7920 010 978 Investor Relations, North America Jason Combes Office: +1 (0) 801 204 2919 Mobile: +1 (0) 801 558 2645 Investor Relations, Australia Dave Skinner Office: +61 (0) 3 9283 3628 Mobile: +61 (0) 408 335 309 Christopher Maitland Office +61 (0) 3 9283 3063 Mobile +61 (0) 459 800 131 Further information: If you have been forwarded this email, you may wish to click here to signup for our media releases http://riotinto.msgfocus.com/c/13nerUiIjZSPUojKgygUk1UO directly. Follow us on Twitter http://riotinto.msgfocus.com/c/13netX2uHWttlxptNDB4qGch Website: www.riotinto.com http://riotinto.msgfocus.com/c/13ney2w3tPEKdPAWROfoDYLd LEGAL INFORMATION - Copyright © 2012 Rio Tinto.

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