As we enter the final month of the transition period that was introduced with the launch of the revised System of Warranties (SoW) in 2021, the World Diamond Council wishes to remind industry participants that, from September 21, 2026, only the revised declaration will apply to all diamond transactions, including rough, polished, and diamond jewelry.

From that date, the revised declaration will stand as the sole applicable SoW reference within the WDC framework.

The System of Warranties is a self-regulatory industry mechanism, created by the World Diamond Council to strengthen and extend the Kimberley Process Certification Scheme (KPCS), through which companies include a declaration on invoices and memos each time diamonds—whether rough, polished, or set in jewelry—change ownership. This declaration confirms that the diamonds originate from legitimate sources and are traded in accordance with applicable standards, thereby cascading this assurance throughout the supply chain.

The System of Warranties remains a cornerstone of trust in the global diamond supply chain, linking companies through a shared commitment to responsible sourcing. The 2021 revision reflects the evolution of industry expectations, incorporating broader due diligence principles, including human rights, anti-corruption, and anti-money laundering practices.

Companies engaged in diamond transactions are encouraged to review their invoice templates and related documentation to ensure alignment ahead of the transition conclusion.

We thank our members and industry partners for their ongoing cooperation and engagement.