Carat4,400 jobs, two years, one mine: De Beers switches off Venetia
South Africa's largest diamond mine — over 40 percent of the country's output, about 740,000 carats in Q1 alone — will pause production for two years while De Beers rephases the underground project and chases higher-value goods.
On Monday De Beers announced it will suspend production at Venetia, the open-pit-turned-underground operation in Limpopo province that is South Africa's largest diamond mine by value and its only De Beers mine, for two years. Roughly 4,400 jobs are at risk pending an employee consultation process. For a country whose diamond industry has contracted for a decade, it is the heaviest single blow yet in a year already full of them.
The scale is not marginal. Venetia produced about 740,000 carats in the first quarter of 2026 — approximately a tenth of De Beers' group output — and accounts for more than 40 percent of South Africa's annual diamond production. The company says group guidance of 21 to 26 million carats stands, with production remodeled across the wider portfolio to cover the shortfall, and that capital spending on Venetia's underground project will be rephased rather than cancelled.
The logic is in the per-carat table. South African production averaged $66 a carat against $110 in Botswana and $353 in Namibia — and Venetia's smaller stones sit precisely in the categories the downturn hit hardest, even as small-stone prices have begun to firm. De Beers has cut more than $100 million in annual overheads since 2024, paused the Tuzo expansion at Canada's Gahcho Kué earlier this year, and is now concentrating capital where each carat earns most. Chief executive Al Cook said the changes are "focused on underpinning our efficiency now and into the future."
The collateral damage is downstream as much as at the pit. De Beers Sightholder Sales South Africa, which supplies rough for local beneficiation, faces a supply question the company says it will work through with sightholders. And the political timing is delicate: Anglo American is deep in the process of selling De Beers, with producer governments circling as potential owners — a two-year pause at the flagship South African asset now becomes a line item in that negotiation.
The desk's view: Venetia joins Severalmaz, Kao and Finsch on the year's growing list of paused, mothballed and rescued mines — the supply discipline this page has tracked all summer, arriving now at the biggest names. It is brutal for Limpopo and rational for the rough market: every carat withheld is a carat the recovering small-stone price does not have to absorb. The trade should read Monday's announcement together with the sight-week price cuts — De Beers is shrinking to a business the market can actually clear.