De Beers, the world-renowned diamond company, is poised to temporarily close South Africa’s largest diamond mine, Venetia, for a period of two years. This strategic decision, which threatens thousands of jobs and removes approximately two-fifths of the country’s diamond production, underscores the severe downturn currently afflicting the global diamond industry. While De Beers aims to mitigate costs and rebalance supply, the move highlights deeper economic and political complexities within its global operations.
The Venetia Mine: A Strategic Asset
Located in Limpopo, the Venetia mine is far from an aging operation. De Beers has invested approximately $2.2 billion in converting it from an open-pit mine to an underground operation, designed to continue production until the 2040s. This significant investment was beginning to yield results, with Venetia’s production increasing by 53% to 740,000 carats in the first quarter of 2026, driven by increased processing of underground ore.
Despite its modern infrastructure and recent production growth, Venetia’s closure is a calculated move to curtail supply. As mining consultant James Allan notes, “if you want to cut back supply, you close Venetia” . This suggests that the decision extends beyond a simple ranking of operational expenses.
Economic Rationale and Production Costs
De Beers’ decision is primarily driven by the need to cut costs amidst a challenging market. The company’s average production cost in South Africa, where Venetia is its sole operating mine, stood at $110 per carat in 2025. This contrasts with significantly lower costs in other key regions: $38 in Botswana, $51 in Canada, and $244 in Namibia . While Venetia is a relatively high-cost operation, it is not the group’s most expensive source of diamonds, indicating that other factors are at play.
The Political Economy of De Beers’ Decisions
James Allan suggests that the ownership structures of De Beers’ various operations played a crucial role in the decision to suspend Venetia’s operations. De Beers operates its Botswana mines through Debswana, a 50-50 partnership with the Botswana government. Similarly, its major Namibian operations are managed through equal partnerships with the state. In contrast, Venetia is operated by De Beers Consolidated Mines, where De Beers holds a controlling interest alongside empowerment shareholder Ponahalo .
Allan points out that further production cuts in Botswana would necessitate negotiations with one of De Beers’ most significant shareholders and commercial partners. “With Venetia, they don’t have to sit down and talk to anybody other than labour. There was more pressure to keep those other mines open,” he explains . This highlights the political and economic leverage held by Botswana and Namibia, whose economies are heavily reliant on diamond revenues. Consequently, South Africa is likely to bear a disproportionate share of the group’s supply reduction efforts.
Impact on South Africa’s Diamond Industry
Venetia produced 2.2 million carats in 2025, accounting for approximately 10% of De Beers’ total production and about 40% of South Africa’s annual diamond output. De Beers’ website indicates that the mine employs around 4,400 employees and contractors, though some reports suggest a direct workforce closer to 3,500 .
South Africa’s total diamond production in 2024 was approximately 5.8 million carats. The suspension of Venetia, following the placement of Petra Diamonds’ Finsch mine into business rescue, leaves Cullinan as the country’s principal remaining large-scale kimberlite operation. This situation signals a sharp contraction of an industry that was foundational to South Africa’s modern mining economy.
Temporary Closure and Future Prospects
De Beers emphasizes that the closure of Venetia is temporary, not permanent. The company has stated that it cannot yet quantify the exact number of job losses, as this will depend on ongoing consultations, but acknowledges that a “significant number of roles” are expected to be affected. Allan clarifies that mothballing the mine is less costly than maintaining a deep-level gold mine, indicating that the infrastructure will be preserved for future reopening .
During the two-year suspension, De Beers plans to continue investing in “critical infrastructure” to enhance the future capacity and efficiency of the underground operation. The company has also committed to maintaining community programs and fulfilling its social and labor plan obligations. The eventual restart of Venetia will hinge on an improvement in rough diamond prices and the broader market conditions, as well as the ability of a potential new owner of De Beers to revitalize demand and the narrative of natural diamonds.
Industry Downturn and De Beers’ Challenges
The global natural diamond industry has been under considerable pressure since the end of the post-pandemic luxury boom. Several factors contribute to this downturn: weak Chinese consumer demand, excess inventories, economic uncertainty, and the rapid expansion of significantly cheaper lab-grown diamonds. These pressures have led to a sharp decline in rough diamond prices.
In the first quarter of 2026, De Beers’ average realized price fell by 19% to $101 per carat, while its rough diamond price index declined by 17%. Despite these challenges, the group has maintained its annual production guidance of between 21 million and 26 million carats.
Marketing Missteps and Strategic Shifts
De Beers acknowledges early signs of recovery, particularly in the US market and for higher-value natural diamonds. The company has implemented measures to reduce overhead costs by over $100 million annually since 2024, disposed of non-core assets, and increased spending on marketing campaigns aimed at restoring the appeal of natural stones.
However, James Allan argues that De Beers and Anglo American allowed the industry’s central marketing proposition to weaken precisely when lab-grown diamonds gained mass-market acceptance. He laments the absence of significant De Beers advertising in the last decade, suggesting a failure to invest heavily in differentiating natural stones—formed over billions of years—from factory-produced alternatives .
Ironically, De Beers initially attempted to launch its own ‘Lightbox’ lab-grown jewelry range, which, according to Allan, inadvertently lent legitimacy to a category that subsequently undercut natural diamond prices. The company has since reversed course, closing Lightbox and repositioning its synthetic-diamond subsidiary, Element Six, towards industrial applications such as semiconductors and high-performance computing.
Implications for Anglo American’s Divestment
The Venetia decision comes at a critical juncture for Anglo American CEO Duncan Wanblad, who is seeking to sell or separate the miner’s 85% stake in De Beers. This divestment is part of a broader restructuring effort to focus Anglo American on copper, iron ore, and fertilizer.
Allan notes that the closure will undoubtedly affect the valuation of De Beers. “Of course it affects the price. You are buying a company that is producing fewer diamonds,” he states, adding, “The longer Anglo holds on to it, the less they are going to get for it. That would appear to be what is playing out” . The temporary suspension of Venetia thus complicates Anglo American’s divestment strategy.
De Beers’ decision to suspend operations at the Venetia mine is a multifaceted response to a challenging global diamond market. While driven by economic pressures and a need to rebalance supply, the move also reflects the intricate political economy of diamond production and past strategic missteps in marketing. The temporary closure of Venetia has significant implications for South Africa’s mining sector and for Anglo American’s plans to divest from De Beers. The future of Venetia, and indeed the natural diamond industry, will depend on a resurgence in demand, effective marketing, and the strategic vision of its future ownership.
