ON February 28, 2026, China launched its first large-scale commercial production line for 8-inch diamond thermal management wafers in Changge, Henan province. Far more than a standalone industrial milestone, this launch signals a fundamental overhaul of the global diamond value system.
For African economies reliant on natural diamond exports, alongside broader Global South nations, this technological shift brings intertwined structural pressures and untapped strategic opportunities.
The technical breakthrough delivers transformative industrial performance. Chinese researchers have scaled single-crystal diamond wafers from mere millimetres to 8 inches (20.3cm), roughly the size of a standard basketball. Boasting a thermal conductivity of over 2,000 W/m·K — more than five times that of copper — synthetic diamond has become the premier cooling material for next-generation AI chips. Modern high-end GPUs draw power exceeding 700W apiece, while conventional copper cooling materials only reach roughly 400 W/m·K, creating an unbreakable thermal bottleneck that limits global computing iteration.
China has built a fully self-sufficient industrial ecosystem covering diamond crystal growth, specialized manufacturing equipment, material engineering and large-scale commercial deployment. This self-reliance stems from more than a decade of targeted research dating back to December 31, 2013, when China developed its first domestically manufactured single-crystal diamond via MPCVD technology.
A critical distinction must be clarified to avoid misjudgment: the global diamond sector has split into two fully independent, non-substitutable markets. The consumer jewellery market comprises mined natural diamonds and lab-grown ornamental diamonds, valued by carat, cut, clarity and colour. The industrial semiconductor market centred on diamond wafers serves AI servers, GaN electronics and high-density computing clusters, valued by thermal conductivity, wafer dimension and machining precision. The two tracks operate under separate market logics.
Mounting structural risks for Africa’s mined diamond economies
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Africa remains the world’s core supplier of natural rough diamonds, with 15 producing states including Botswana, South Africa, Angola, Namibia and the DRC dominating global supply. The continent’s natural diamond output surpassed US$5 billion in 2024, with Botswana, Angola, Namibia and South Africa ranking among the world’s top ten diamond-producing economies by market value.
National fiscal survival for many African nations hinges entirely on diamond extraction. Seventy percent of Botswana is arid desert, and the country escaped extreme poverty solely via diamond discoveries in the 1960s. To date, diamonds contribute 30% of Botswana’s GDP and 80% of its total export revenue. Angola yielded 15.19 million carats of diamonds in 2025, marking an 8% year-on-year increase, while Namibia recorded a 32.9% drop in diamond revenue from 2023 to 2024. Such mono-industrial economic structures leave these states with zero risk buffer against global market volatility.
China holds unmatched scale advantages in global synthetic diamond manufacturing, accounting for 95% of worldwide industrial diamond capacity and over 70% of ornamental lab-grown diamond output, with Henan Province as the global production hub. Driven by lower production costs, lab-grown jewellery diamonds, combined with global luxury consumption cycles, rising African mining costs and regional geopolitical fluctuations, have dragged natural diamond prices down from a peak of $6,819 per carat in May 2022 to $4,997 per carat by December 2024.
Market fallout has been tangible across Africa. Botswana’s diamond output plummeted 40% in 2025 compared with 2023 figures, and De Beers, Africa’s leading diamond miner, posted a US$511 million annual loss in 2025. Shrinking diamond revenue, compounded by rigid fiscal structures and surging public spending, pushed Botswana’s public healthcare system to the brink of collapse in August 2025, prompting a national state of emergency. By volume, lab-grown diamonds captured 50% of the US engagement ring market in 2025, claiming 20% of the global jewellery diamond market by value.
The booming industrial diamond track does not compete directly with natural diamonds, yet it redirects global capital, technology and industrial capacity away from traditional mined diamond sectors. For African states trapped in raw diamond extraction and crude export models, sweeping industrial restructuring leaves no room for inaction.
Dual development paths for African diamond economies
Market pressure presents a forced opportunity for African diamond producers to restructure their global industrial positioning and exit the low-value raw export cycle.
First, accelerate domestic beneficiation to capture upstream value. Botswana, Angola, Namibia and South Africa have rolled out policies to localize rough diamond cutting, polishing and jewellery fabrication. Botswana President Duma Boko has mandated prioritized domestic processing for all domestically mined diamonds, marking a pivotal policy shift from raw commodity exporter to finished goods manufacturer.
Second, streamline cross-border supply chains to eliminate middleman markups. Roughly 90% of global rough diamonds flow to India for craftsmanship processing, and India and Botswana are building direct procurement channels to cut layered intermediary costs and stabilize profit margins for African miners.
Third, consolidate the premium positioning of natural diamonds via unified branding. In June 2025, six African diamond-producing nations agreed to allocate 1% of annual rough diamond sales to the Natural Diamond Council’s global branding campaign, highlighting natural diamonds’ geological rarity, cultural connotation and collectible value to secure high-end consumer market share.
Beyond jewellery market adjustments, the industrial diamond thermal management sector represents a high-growth blue ocean, projected to hit a market size of US$50 billion to US$152 billion by 2030. Africa possesses innate strengths to integrate into this emerging supply chain.
The continent can supply carbon-based raw materials required for CVD diamond synthesis. It also boasts abundant low-cost renewable energy — solar power across the Sahara, hydropower in Central Africa, and geothermal energy along the East African Rift Valley — ideal for energy-intensive synthetic diamond fabrication. Additionally, African tech-startup economies can enter the sector via low-barrier downstream links, including wafer packaging, performance testing and system integration.
China’s decade-long diamond industrial development model offers replicable experience for Global South nations: sustained long-term state strategic investment, end-to-end industrial chain building, university-institute-enterprise collaborative research and development, and large-scale capital investment to drive production cost reduction. Africa need not compete head-to-head with China on mass wafer production, but can adapt this model to foster homegrown strategic manufacturing capabilities.
BRI cooperation framework, risks and Africa’s forward strategy
As a member of the Belt and Road Initiative Think Tank, I identify four pragmatic cooperation avenues tailored to the new diamond industrial landscape under the BRI framework. First, equal technical exchanges and application-level joint R&D, conducted under full intellectual property protection and international trade rules, to build basic industrial diamond capacity in Africa. Second, joint investment in African renewable energy infrastructure to support energy-heavy diamond manufacturing. Third, bilateral vocational education partnerships to cultivate specialized CVD engineering talent. Fourth, diversified economic cooperation to reduce African fiscal reliance on raw diamond exports.
Nonetheless, tangible constraints block African industrial transformation. Near-term jewellery market competition will continue suppressing natural diamond fiscal revenue for mono-resource states. Most African nations lack massive capital reserves and core CVD technology for synthetic diamond mass production. Chinese manufacturers hold first-mover advantages and long-term cooperative ties with global chip giants Nvidia and AMD, creating solid market entry barriers. Protected Chinese proprietary CVD intellectual property also rules out shortcut technology acquisition for late entrants, while all global participants face shared risks of rapid technical iteration and updated industrial standards.
The global diamond industry’s dual-track evolution is irreversible. African and Global South nations cannot afford passive subordination in the new industrial order. Sustainable development requires five targeted moves: diversify resource-dependent economies, seize value via full-chain diamond beneficiation, invest in infrastructure and skilled talent, build equitable BRI industrial partnerships, and implement dual-track layout for premium natural diamonds and emerging industrial diamond businesses.
For decades, mined diamonds have stood as Africa’s defining gift to the global consumer economy. In the AI-driven industrial era, Africa holds the energy, resource and bargaining power to rewrite its role in global diamond governance. The continent must take proactive control of its resource destiny, rather than yielding to external industrial shifts.
*Saxon Zvina is principal consultant, Skyworld Consultancy Services
member, Belt Road Initiative Think Tank
Email: saxon@skyworld.co.zw X: @saxonzvina2