The phrase "LBMA responsible sourcing" refers, in the round, to the body of supply-chain due-diligence rules and audit obligations that the London Bullion Market Association has imposed on its accredited refiners since 2012, and to the cascading effect that those rules have had on every actor downstream of those refiners, from bullion banks and central banks at one end of the chain to bench jewellers and retail consumers at the other. It is the reason that "responsibly sourced gold" is, in practice, almost always shorthand for "gold from an LBMA Good Delivery refiner that has passed its annual Responsible Gold Guidance audit".

Origins and the OECD framework

The framework's intellectual ancestor is the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, first published in 2011. The OECD Guidance describes a five-step due-diligence process (establish strong management systems, identify and assess risk, design and implement a strategy to respond to risks, carry out independent third-party audit, report on supply-chain due diligence) which is generic across minerals. The LBMA's contribution was to take that generic framework, write it specifically for gold, and impose it as a binding admission and ongoing membership condition on every refiner that wanted to remain accredited to stamp London Good Delivery bars.

What the rules actually require

Under the current LBMA Responsible Gold Guidance, an accredited refiner is obliged to know the source of every kilogram of gold it processes. That means full upstream traceability for mined material (mine-of-origin documentation, in many cases including geographical coordinates and operator name), and full identification of the immediate seller for recycled material, with enhanced due diligence on any flow originating from or transiting a high-risk jurisdiction. Refiners are required to maintain a formal management system, to designate a senior officer responsible for compliance, to conduct supplier site visits where indicated by risk, and to refuse or suspend any flow that fails the due diligence assessment.

An independent auditor reviews the refiner's compliance against this framework annually. The audit is carried out under the LBMA's Responsible Sourcing audit programme, by an assurance firm drawn from a panel of LBMA-approved providers. The audit report is reviewed by the LBMA's Physical Committee, and a passing report is a precondition for continued admission to the Good Delivery List. A failed audit results either in remediation requirements with a defined timeline or, in serious cases, in suspension or removal from the list, both of which are publicly disclosed.

The 2018 Valcambi episode and other test cases

The rules have been tested in practice. Several refiners have been suspended or removed from the Good Delivery List over the past decade for sourcing breaches, ranging from undocumented Latin American artisanal gold to flows that the auditors could not satisfy themselves were free of conflict-zone material. Each of these episodes generated significant trade press coverage and forced the affected refiner to undertake remediation, sometimes including the public-facing publication of additional supply-chain transparency reports. The cumulative effect has been to make it extremely difficult for a refiner on the list to take in gold of unknown origin, and equally difficult for upstream sellers of conflict or otherwise non-compliant gold to find a route to market through the London system.

The downstream cascade into the jewellery trade

For the jewellery trade, the practical consequence is that "responsibly sourced gold", as the phrase is used in retail-facing marketing, is almost always either gold purchased directly from an LBMA-listed refiner, or gold purchased from a chain of intermediaries that themselves can demonstrate that the metal originated with an LBMA-listed refiner. A small jeweller buying casting grain or sheet from a major refinery (Metalor, Heraeus, Valcambi, PAMP, Argor-Heraeus, Rand Refinery and so on) inherits the upstream due-diligence work that the refiner has already done and had audited.

The Responsible Jewellery Council, which is the principal certification body in the downstream jewellery industry, recognises LBMA-accredited refined gold as a compliant input for its Code of Practices certifications, and many luxury houses (Cartier, Tiffany & Co., Bulgari and others) have made public commitments to source only LBMA-grade refined gold for that reason. The Kimberley Process plays the equivalent role for rough diamonds, but it is widely seen as significantly weaker than the LBMA framework, with a less rigorous audit regime and with persistent gaps around polished and re-polished material; the LBMA system is generally regarded by the trade as the more credible model.

Limitations and ongoing critique

The framework is not without its critics. The most persistent complaint is that the rigour of the audit varies between refiners and between auditors, and that public reporting could be more granular. NGOs including Global Witness and Swissaid have published reports identifying specific cases where they argue the diligence regime failed to catch flows that should have been suspended, and the LBMA has responded with successive tightenings of the Guidance, most notably in the 2017 and 2021 revisions. A second persistent gap is that the framework only covers refined bullion within the LBMA system; gold that bypasses the LBMA route entirely (for example, regional refiners outside the Good Delivery list, or undocumented artisanal flows that never reach an accredited refiner) is by definition outside the framework's reach.

For the trade, the takeaway is structural. The LBMA system is the only globally-operating, third-party-audited, supply-chain due-diligence regime for refined gold; it is not perfect, but it is the reference standard, and the practical question for any jeweller is not whether to engage with it but whether to source within it or outside it.