China Top 10 Lab-Grown Diamond Manufacturers & Supply Chain Analysis

What is a Lab-Grown Diamond and How Does the Industry Work?

Lab-grown diamonds (also known as synthetic or lab-created diamonds) are diamonds cultivated inside high-tech laboratories and specialized manufacturing facilities. Chemically, physically, and optically identical to natural mined diamonds, they share the exact same crystal structure, Mohs hardness, and brilliance. They cannot be distinguished by the naked eye and require specialized gemological testing equipment for identification.

The production of rough lab-grown diamonds relies primarily on two core technology routes:

• High Pressure High Temperature (HPHT): This method replicates the extreme pressure and thermal conditions deep within the Earth’s mantle, forming diamond crystals in just a few weeks.
• Chemical Vapor Deposition (CVD): This technique allows carbon atoms to deposit layer by layer onto a diamond seed crystal inside a vacuum chamber.

Lab-created diamonds effectively solve the legacy challenges of natural diamonds, such as finite reserves, high cost structures, and environmental damage from mining. Beyond fine jewelry and engagement rings, lab-grown diamonds have emerged as a critical innovation in thermal management for AI chips, thanks to a thermal conductivity four to five times higher than that of copper.

In this market report, we focus on the lab-grown diamond supply chain and highlight the top 10 core companies based on business relevance and key market catalyst metrics for further research and analysis.

Disclaimer: The following content is provided strictly for educational and discussion purposes and does not constitute investment advice, financial guidance, or any form of commercial guarantee.

The Top 10 Core Lab-Grown Diamond Manufacturers and Equipment Suppliers

1. Huanghe Whirlwind (Synthetic Diamond Veteran)

• Core Business: Research, development, production, and sales of superhard materials and related products, including industrial diamond grit, lab-grown diamonds, micron diamond powder, and diamond cutting tools/saw blades.
• Industry Context: As a legacy manufacturer of synthetic diamonds, Huanghe Whirlwind operates an end-to-end model—building its own hydraulic presses and synthesizing diamond materials. Its portfolio spans industrial abrasives, gem-grade lab-grown roughs, diamond powder, and downstream tools, positioning it squarely in the upstream synthesis segment with extensions into heat sink substrates.
• Key Highlights: The company previously led global capacity in synthetic diamonds. It features a fully integrated layout covering hydraulic press manufacturing, synthesis, micron powder processing, and tool fabrication. Furthermore, its commissioning of China’s first 8-inch diamond heat sink production line directly positions it in the emerging market for AI chip cooling.

2. Power Diamond (Large Carat Specialist)

• Core Business: R&D, manufacturing, and sales of synthetic diamond products, including lab-grown gem diamonds, single-crystal industrial diamonds, and diamond micron powder.
• Industry Context: Power Diamond masters both HPHT and CVD synthesis technologies. The company specializes in gem-quality lab-grown diamond roughs and large-carat synthetic diamonds, with a strong focus on export markets, placing it in the upstream rough diamond synthesis sector.
• Key Highlights: A primary HPHT manufacturer of gem-grade diamonds, the company has achieved significant technological breakthroughs in synthesizing ultra-large-carat diamonds. Demonstrating strong financial performance within the sector, Power Diamond has strategically reallocated major fundraising proceeds into functional diamond thermal materials.

3. Huifeng Diamond (Micron Powder Expert)

• Core Business: Research, development, production, and sales of diamond micron powder and crushed shaped diamond abrasives.
• Industry Context: Huifeng’s core focus is precision diamond micronizing. Diamond powder serves as an essential raw material for cutting, shaping, and polishing both lab-grown and industrial diamonds. The company has also expanded into CVD thermal materials and lab-grown diamond retailing, bridging midstream abrasive processing and downstream consumer applications.
• Key Highlights: A leading domestic supplier of diamond micron powder, Huifeng co-drafted China’s national standards for synthetic diamond micron powder. Recognized as a national-level “Little Giant” enterprise specializing in niche technologies, its core products hold national manufacturing titles, reflecting strong technical authority in the supply chain.

4. Hongchang Technology (Cross-Industry Newcomer)

• Core Business: R&D and manufacturing of precision components for household appliances, specializing in fluid solenoid valves for white goods.
• Industry Context: While its legacy business centers on home appliance components, Hongchang Technology announced strategic equity acquisitions of two diamond enterprises in 2026. The target entities focus on large-carat fancy colored lab-grown diamonds and diamond thermal management materials, marking the company’s official entry into the diamond sector.
• Key Highlights: Through strategic M&A, the company acquired comprehensive capabilities spanning material R&D, process innovation, and mass production. This approach bypasses early-stage capacity saturation, directly positioning the firm in high-value-add segments: colored lab-created diamonds and advanced heat-dissipation materials.

5. Hengsheng Energy (In-House Equipment Developer)

• Core Business: Production and supply of steam and electricity via combined heat and power (CHP) generation.
• Industry Context: Beyond its utility operations, Hengsheng Energy operates CVD diamond synthesis through its controlled subsidiary, Huamao Technology. The unit designs and builds proprietary microwave plasma chemical vapor deposition (MPCVD) equipment to grow diamond crystals, producing gem-grade lab diamonds and functional diamond materials within the upstream synthesis tier.
• Key Highlights: The company maintains a complete chain covering equipment R&D, crystal growth, and post-processing. With 200 units of MPCVD equipment operational and plans to expand to 300 units by year-end, annual capacity approaches approximately 1 million carats. Steady cash flow from its core heat and power utility business provides strong financial backing for expansion.

6. SF Diamond (Superhard Tooling Pioneer)

• Core Business: R&D and production of polycrystalline superhard materials, focusing on polycrystalline diamond (PCD) compacts for oil and gas drilling and high-precision machining tools.
• Industry Context: Building on its core PCD compact business, SF Diamond independently developed MPCVD equipment. Through its subsidiary, Tianxuan Semiconductor, the company produces gem-grade lab-grown diamonds and CVD functional diamond materials, spanning multiple superhard material segments.
• Key Highlights: SF Diamond holds a leading position in CVD functional diamond capacity, with annual output reaching the million-carat scale. High profit margins from its oil and gas drilling compact business deliver stable capital and technological support for its growing lab-diamond and thermal material ventures.

7. Worldia (CVD Technology Leader)

• Core Business: R&D and manufacturing of superhard cutting tools and functional diamond products, specializing in ultra-precision diamond tooling.
• Industry Context: Originating as a superhard tooling manufacturer, Worldia covers lab-grown diamonds and functional materials. Its strategic priorities include diamond heat spreaders and diamond-copper composite materials targeted at high-end industrial applications.
• Key Highlights: Worldia is among the few industry players possessing capabilities across Hot Filament CVD (HFCVD), Direct Current (DC) Arc Jet CVD, and Microwave Plasma CVD (MPCVD) growth technologies. Its accumulated expertise in precision tooling translates directly into advanced functional material applications.

8. Sinomach Red Arrow / Zhongbing Red Arrow (State-Owned Defense & Diamond Giant)

• Core Business: Dual-focus operations in defense equipment (smart munitions) and superhard material manufacturing.
• Industry Context: Its wholly owned subsidiary, Zhongnan Diamond, manufactures industrial diamond grit, lab-grown rough diamonds, and PCD compacts via the HPHT method. Serving as the primary non-defense business unit, it operates within the upstream synthesis segment.
• Key Highlights: Zhongnan Diamond holds a leading position in global industrial diamond production. Backed by its state-owned parent, China Ordnance Industries Group, the company leverages decades of large-scale industrial diamond synthesis expertise to ensure reliable, high-volume supply of gem-grade lab-grown diamonds.

9. Sinomach Precision (Press Equipment Originator)

• Core Business: R&D and manufacturing of rolling bearings, abrasives, and grinding tools within the machinery and superhard materials sectors.
• Industry Context: Its subsidiary, ZZSM (Sanmo Institute), pioneered China’s superhard materials industry. The firm manufactures forged cubic press equipment used in HPHT diamond synthesis for third-party producers while also producing large single-crystal diamonds via CVD, operating a dual model across equipment and materials.
• Key Highlights: Having manufactured China’s first cubic press in 1965, Sinomach Precision has supplied synthesis equipment to major global players such as Element Six and Sumitomo Electric. Its forged cubic presses offer extended operational lifespans and higher synthesis efficiency, making its hardware vital for upstream producers expanding capacity.

10. Jingsheng Mechanical & Electrical (Crystal Growth Equipment Leader)

• Core Business: R&D, manufacturing, and sales of crystal growth equipment and automated control systems.
• Industry Context: Operating under an “equipment plus materials” strategy around hard and brittle crystals (silicon, sapphire, silicon carbide, and diamond), Jingsheng leverages its crystal growth technologies to enter the synthetic diamond industry as an upstream equipment specialist.
• Key Highlights: A top-tier manufacturer of crystal growth hardware in China, its fully automated Czochralski single-crystal furnaces hold national manufacturing honors. By transferring its crystal growth expertise to diamond synthesis, the firm drives down unit production costs through in-house equipment innovations.

Attached: Table of China’s Lab-Grown Diamond Industry Chain