China to Require Licenses for Artificial Diamond Exports Starting November 8

As China tightens control over high-tech manufacturing supply chains, U.S. importers relying on these materials for industrial use are advised to prepare for potential impacts on their operations.

China is introducing new export controls on certain artificial diamonds and related products beginning November 8, 2025.

Under the new rules, Chinese exporters will need licenses to ship artificial diamond micropowders, single crystals, wire saws, and grinding wheels.

These products are widely used in precision cutting, semiconductors, electronics, and aerospace components.

The Chinese Ministry of Commerce said the measures are designed to “safeguard national security and interests while fulfilling international non-proliferation obligations.”

The announcement comes as global demand for synthetic diamonds continues to grow, both as an alternative to natural diamonds and as a critical input in advanced manufacturing.

Although the new rules come into effect just one day before the expiry of the U.S.–China tariff truce, the measures were not directly linked to trade negotiations between the two countries. 

Categories under new export controls

According to a joint statement by China's commerce ministry and customs authority, the measures apply to six specific categories of items, covering both artificial diamond products and related technologies:

• Artificial diamond micropowder with an average particle size of 50 micrometres or smaller.
• Artificial diamond single crystals with an average particle size larger than 50 micrometres but not exceeding 500 micrometres.
• Artificial diamond wire saws with specified technical characteristics.
• Artificial diamond grinding wheels with particular design features.
• Direct current plasma chemical vapour deposition (DCPCVD) equipment used in diamond synthesis.
• DCPCVD process technology used in artificial diamond production.

The statement also said that items not on the list but with similar technical parameters should be declared as “not subject to export control” with supporting details in customs declarations.

China continues to expand its list of controlled exports

Artificial diamond is part of a wider list of products now subject to export licensing.

The commerce ministry and customs authority confirmed that export controls will also cover lithium-ion batteries, artificial graphite anode materials, and key manufacturing equipment.

Moreover, new rare earth elements were added to China’s export control list. These are holmium, erbium, thulium, europium and ytterbium.

Next steps for U.S. importers

The United States is among the destinations for China’s artificial diamond exports.

With the new licensing rules taking effect, some U.S. importers may face new documentation requirements and procedural changes. Recommended next steps to mitigate risks include:

• Reviewing supplier contracts to confirm delivery terms under the new licensing rules
• Building in longer lead times to account for the approval procedures required in China
• Evaluating alternative suppliers in other regions and exploring other sourcing options
• Working with a customs broker to stay updated on compliance procedures and documentation requirements

How Cole International can help

At Cole International, we constantly monitor changing trade regulations and offer customs and compliance consulting services to help businesses navigate these changes.

Additionally, we provide timely and efficient customs brokerage services to help U.S. importers streamline their customs clearance processes. 

If you import artificial diamond products or rare earth elements from China, reach out to one of our trade professionals to discuss how these new export rules and restrictions may impact your business.