The EU Conflict Minerals Regulation (formally Regulation (EU) 2017/821, also known as the EUCMR) is a binding piece of European Union legislation that came into full effect on 1 January 2021. It requires EU-based importers of tin, tantalum, tungsten, and gold — collectively abbreviated as 3TG — to exercise structured supply-chain due diligence in order to prevent those minerals from being sourced from conflict-affected or high-risk areas (CAHRAs). Although coloured gemstones and diamonds fall outside the regulation's material scope, the EUCMR is directly relevant to the jewellery trade because gold and, to a lesser extent, the other covered metals are integral to jewellery manufacture, and because the regulation has shaped broader industry expectations around responsible sourcing.

Legislative Background

The regulation was adopted by the European Parliament and the Council of the European Union in May 2017, following years of debate about the role of mineral revenues in financing armed conflict, particularly in the Democratic Republic of Congo and neighbouring states in central Africa. It draws its conceptual and procedural framework from the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, first published in 2011 and subsequently updated, which remains the internationally recognised benchmark for mineral supply-chain governance. The regulation was designed to complement, rather than replace, existing voluntary frameworks and national measures, and it explicitly references alignment with OECD guidance as the standard of compliance.

Scope and Thresholds

The regulation applies to EU importers of 3TG minerals and metals above specified annual import volume thresholds. These thresholds were set to focus compliance obligations on commercially significant importers while reducing the administrative burden on very small operators. Importers above the relevant threshold must:

• Establish and implement a supply-chain due diligence policy aligned with OECD guidance;
• Maintain a management system capable of identifying and assessing supply-chain risks;
• Develop and implement a risk-management plan to respond to identified risks;
• Commission independent third-party audits of their due diligence practices; and
• Publish an annual supply-chain due diligence report disclosing their findings and actions.

Member State competent authorities are responsible for carrying out ex-post checks on importers' compliance, and the European Commission publishes a regularly updated list of responsible smelters and refiners that have been verified through recognised industry programmes — a practical tool that importers may use to streamline their own due diligence.

Relevance to the Gemstone and Jewellery Sector

Coloured gemstones — including ruby, sapphire, emerald, and the many other species traded internationally — are not covered by the EUCMR. Diamonds are similarly excluded, being addressed separately under the Kimberley Process Certification Scheme (KP), a multilateral governmental initiative established in 2003 to stem the flow of conflict diamonds. The absence of gemstones from the EUCMR reflects both the political history of the regulation, which was driven primarily by concerns about central African mineral conflicts involving metals, and the practical difficulty of applying a smelter- or refiner-based audit model to the highly fragmented, artisanal-dominated coloured-stone supply chain.

Nevertheless, the regulation exerts indirect influence on the jewellery sector in two important ways. First, any EU-based jewellery manufacturer or retailer that imports gold above the applicable threshold — whether as refined metal, grain, or semi-fabricated alloy — is directly subject to its requirements. Second, the EUCMR has reinforced and, in some markets, accelerated the adoption of voluntary responsible-sourcing standards across the broader jewellery industry. The Responsible Jewellery Council (RJC), whose Code of Practices covers gold, platinum group metals, diamonds, and coloured gemstones, has aligned its due diligence requirements for covered metals with the OECD guidance that underpins the EUCMR, creating a degree of harmonisation between the mandatory and voluntary frameworks.

Relationship to Other Frameworks

The EUCMR sits within a wider international architecture of supply-chain governance instruments. The OECD Due Diligence Guidance, which the regulation mandates, is the common reference point shared with the RJC, the London Bullion Market Association (LBMA) Responsible Gold Guidance, and the World Gold Council's Conflict-Free Gold Standard. The Kimberley Process, though focused on diamonds, established the precedent of government-backed certification for conflict-affected mineral commodities that informed subsequent legislative efforts including the EUCMR. Taken together, these frameworks reflect a sustained effort by governments, industry bodies, and civil society to embed human-rights and conflict-sensitivity considerations into mineral and metal supply chains — an effort that, for coloured gemstones, remains largely dependent on voluntary programmes and private certification rather than binding law.

Limitations and Ongoing Debate

Critics of the EUCMR have noted that its coverage of only four mineral categories leaves significant gaps; gemstones, cobalt, mica, and other commodities associated with conflict or serious human-rights concerns are unaddressed. Within the gemstone trade, advocacy organisations and some industry participants have called for equivalent due diligence obligations to be extended to coloured stones, pointing to documented concerns about mining conditions in certain producing regions. As of the time of writing, no binding EU legislation equivalent to the EUCMR has been enacted for gemstones, though the European Commission's broader Corporate Sustainability Due Diligence Directive (CS3D), adopted in 2024, introduces horizontal human-rights and environmental due diligence obligations for large companies operating in the EU that may, depending on implementation, affect gemstone supply chains indirectly.

Further Reading

• OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas — oecd.org
• Responsible Jewellery Council Code of Practices — responsiblejewellery.com
• Kimberley Process Certification Scheme — kimberleyprocess.com