China's Lab-Grown Diamond Makers Pivot to AI and Chip Sectors

China's lab-grown diamond producers are strategically pivoting from the jewelry market to high-tech sectors, targeting emerging demand for advanced materials in semiconductors, AI servers, and other industrial applications. This shift comes as the gem market faces intensifying competition and price pressure, prompting manufacturers to seek higher-value opportunities.

A Strategic Shift from Gems to Tech

Chinese companies, which produce approximately 50% of the world's lab-grown diamonds, are looking to leverage their manufacturing scale for more profitable industrial uses. Feng Canjun, an entrepreneur whose factory in Henan province produces 2 million carats annually, told Reuters he aims to increase the share of his products used in functional materials to over 50% by 2030, reducing the portion for jewelry from 70% to a maximum of 30%.

According to Feng, gross profit margins for industrial-grade diamonds are around 50%, compared to 30% to 40% for gem-grade stones. This economic incentive is driving investment in the transition. Henan Liliang Diamond, for example, plans to redirect 1 billion yuan (approximately $149.18 million) originally raised for gem production toward a new functional-diamond project, according to a company filing cited by Reuters.

The AI and Semiconductor Opportunity

Analysts see thermal management for AI infrastructure as a significant near-term opportunity for synthetic diamonds, which possess properties that can improve the performance of advanced electronics. The International Energy Agency projects that electricity consumption by data centers will more than double by 2030, with AI as the primary driver, increasing the need for efficient cooling solutions.

Several major technology firms are reportedly exploring the use of synthetic diamonds:

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• Chinese media have reported that Huawei and TSMC are exploring the material for chip cooling.
• Lenovo has launched a laptop in China featuring a diamond-copper cooling material.
• Intel CEO Lip-Bu Tan disclosed a personal investment in Diamond Foundry, a lab-grown diamond maker developing chip-grade wafers.

While the use of diamonds as a direct semiconductor material is a longer-term prospect, research highlights its potential. In April, the Ningbo Institute of Materials Technology & Engineering reported that diamond-copper cooling modules improved heat transfer by 80% and boosted chip performance by 10%, as per Reuters.

Geopolitical and Market Implications

The industry's transition has direct implications for global technology supply chains and the ongoing U.S.-China tech rivalry. Manan Goenka, an engagement manager at Ken Research, told Reuters that China's production dominance could become a supply-chain vulnerability for the United States if synthetic diamonds become critical for AI and chip manufacturing.

Recognizing its strategic importance, Beijing has already moved to place machinery and key components for synthetic diamond production under export controls. "The broader implication is that synthetic diamonds could increasingly become part of the strategic trade-policy conversation surrounding semiconductors, rare earths and advanced manufacturing," Goenka said. The potential market could be vast, with independent diamond consultant Robert Bouquet suggesting to Reuters that the scope in technology could be "significantly above the retail diamond jewellery business, which itself is approximately $100 billion a year."