Rio Tinto Exits Diamond Mining to Focus on Energy Transition Metals

Rio Tinto closes its last diamond mine, Diavik, ending 50+ years in the sector. The strategic pivot aims to divest non-core assets and focus capital on iron ore, copper, and lithium for the energy transition.

Mining giant Rio Tinto is closing a significant chapter in its corporate history, marking a definitive end to its diamond operations after more than fifty years. The impending closure of the Diavik mine in Canada signals the company's complete withdrawal from a once-prestigious sector. This move is a key component of a broader corporate restructuring designed to sharpen the focus on metals essential for the global shift to cleaner energy.

A Strategic Portfolio Shift

The departure from diamonds aligns precisely with the strategic vision of the world's second-largest mining company. Under CEO Simon Trott, Rio Tinto aims to generate between $5 billion and $10 billion by divesting non-core assets and improving operational efficiency. Management is increasingly concentrating its portfolio on iron ore, copper, aluminum, and lithium.

To unlock capital for these higher-margin future projects, other business units are under review. The strategic assessment of the company's titanium and borate operations is advancing, with Rio Tinto now entering a phase of active market testing for a potential sale. This follows an industry-wide trend of streamlining operations through divestitures to enhance capital discipline.

The Final Chapter at Diavik

The Diavik mine in Canada's Northwest Territories is ceasing operations after 23 years, having produced over 150 million carats of rough diamonds. Its economically viable reserves are now depleted. The final stones extracted are being processed and are expected to be sold through the company's international client network until at least 2026.

Concurrently, the site will enter a decommissioning phase scheduled to last until 2029. The local workforce will be substantially reduced from 900 to between 200 and 300 people over the next six months. This represents another blow to the regional mining industry, which saw other local operators suspend open-pit activities last year due to price pressure from synthetic diamonds.

Solid Financial Footing for Transition

Financially, Rio Tinto is well-positioned for this strategic pivot. A recent eight percent increase in copper equivalent production and record iron ore volumes contributed to an adjusted EBITDA of $25.4 billion. Shareholders benefited from this operational strength through a $6.5 billion dividend payout.

This fundamental performance is mirrored in the company's market valuation. Over a twelve-month period, the share price advanced by nearly 30 percent, closing at €76.14 on Wednesday. However, with a Relative Strength Index (RSI) reading of 80.9, the stock is considered technically overbought in the short term following its recent gains.

With the diamond era conclusively over, investor attention turns to the pace of the strategic realignment. The planned divestments of the titanium and borate businesses mark the next concrete milestones in further streamlining the portfolio and strengthening Rio Tinto's position in critical minerals.