GemFair is a traceability and ethical-sourcing platform developed by Gemfields, the London-listed coloured-gemstone mining company, to address the significant challenges of integrating artisanal and small-scale mining (ASM) into verifiable, responsible supply chains. Launched as a pilot programme in Sierra Leone in 2018, GemFair provides participating miners with training, fair-pricing mechanisms, and chain-of-custody documentation that allows rough gemstone material to carry a credible provenance signal from the point of extraction through to the wholesale and retail markets. The initiative represents one of the more structured corporate-led attempts to formalise the ASM sector within the coloured-gemstone industry, a sector that, by most estimates, accounts for the majority of the world's coloured-gemstone production yet has historically operated with limited regulatory oversight or market transparency.

Background and Context

Artisanal and small-scale mining is the dominant mode of coloured-gemstone extraction globally. Unlike the large-scale, mechanised operations that characterise much of the diamond and base-metals industries, coloured-gemstone deposits — particularly ruby, sapphire, emerald, and the wide range of semi-precious stones — are frequently found in geologically complex, dispersed deposits that are economically and practically suited to hand-tool extraction by small groups of miners. This structural reality means that a substantial proportion of the world's rubies, sapphires, and other coloured stones pass through informal or semi-formal channels before reaching licensed dealers and international markets.

The consequences of this informality are well-documented: miners frequently receive prices far below market value due to information asymmetries and dependence on local middlemen; occupational safety standards are inconsistently applied; environmental remediation is often absent; and the absence of documentation makes it difficult for downstream buyers — retailers, brands, and consumers — to verify the origin or ethical status of material they purchase. These concerns have grown in commercial importance as consumer expectations around responsible sourcing have intensified, particularly in European and North American markets.

Programme Structure and Operations

GemFair's operational model centres on enrolling artisanal miners into a structured programme that combines several interlocking elements. Participating miners receive training in safe mining practices, environmental stewardship, and basic business literacy. Crucially, the platform establishes a pricing mechanism intended to reduce the information gap between miners and the broader market: enrolled miners are offered prices benchmarked against prevailing wholesale values, reducing their dependence on local intermediaries who may offer substantially below-market rates.

The chain-of-custody component is the element of most direct relevance to downstream buyers. Material purchased through GemFair is documented at the point of acquisition, with records maintained through the supply chain. This documentation allows a retailer or brand to state, with a degree of specificity unusual in the coloured-gemstone trade, that a given parcel of rough originated from a GemFair-enrolled mining community in Sierra Leone. The platform uses a combination of physical tagging and digital record-keeping to maintain this chain of custody.

Sierra Leone was selected as the initial pilot location in part because of Gemfields' existing operational presence and relationships in West Africa, and in part because the country has a substantial artisanal mining sector — particularly for diamonds, but also for coloured stones including rutile and other minerals — with well-documented challenges around formalisation and fair compensation. The pilot focused initially on gemstone-producing communities in the country's interior, with the intention of demonstrating a replicable model that could be extended to other geographies.

Relationship to Gemfields and Corporate Strategy

GemFair is a subsidiary initiative of Gemfields, which operates large-scale mining concessions at Kagem in Zambia (one of the world's largest emerald mines) and Montepuez in Mozambique (a significant ruby deposit). Gemfields' core business is the mining and auctioning of rough coloured gemstones at scale, and GemFair represents a strategic extension of the company's positioning around responsible sourcing — a narrative that has become increasingly central to the marketing of premium coloured gemstones.

It is worth noting that GemFair operates somewhat separately from Gemfields' primary mining operations: the platform is specifically designed to engage with artisanal miners who are not employees of Gemfields and who operate independently, often on informal or licensed small-scale concessions. The commercial logic for Gemfields includes both the reputational benefit of association with a credible ethical-sourcing initiative and the potential to develop a supplementary supply of traceable rough material that can be offered to buyers seeking provenance documentation.

Industry Positioning and Complementary Initiatives

GemFair operates within a broader ecosystem of industry-level responsible-sourcing efforts. The Responsible Jewellery Council (RJC) provides certification standards for companies across the jewellery supply chain. The Coloured Gemstone Working Group, which has brought together major retailers and brands, has worked to develop sourcing standards and supplier engagement frameworks. The OECD's Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas provides a widely referenced framework for risk assessment in mineral supply chains.

GemFair's approach is distinguished from these broader frameworks by its direct operational engagement at the mine level — rather than auditing existing supply chains, the platform attempts to build a new, parallel channel with documentation embedded from the outset. This approach has parallels with initiatives in the diamond sector, such as the Maendeleo Diamond Standards developed for artisanal diamond miners in the Democratic Republic of Congo, though the coloured-gemstone context presents its own distinct challenges given the greater geological and geographic diversity of the sector.

Challenges and Limitations

Formalising artisanal mining is a task that has proven difficult across multiple commodities and geographies, and GemFair faces structural challenges common to the field. Enrolment depends on miners voluntarily participating in a programme that imposes documentation requirements and may initially offer prices that, while better than local middlemen, still reflect the realities of rough-gemstone valuation. Miners operating in remote areas may have limited access to the training and support infrastructure the programme requires. Verification of chain-of-custody claims at scale remains technically and logistically demanding.

There is also the question of market uptake: the commercial value of GemFair provenance documentation depends on downstream buyers — brands, retailers, and ultimately consumers — placing a meaningful premium on traceable material. While demand for ethically sourced gemstones has grown, the price premium that the market will sustain for documented ASM material remains variable and, in many segments, modest. The long-term viability of the platform depends in part on whether that premium is sufficient to sustain the operational costs of the programme and to deliver meaningfully better outcomes for miners relative to informal channels.

Significance for the Trade

Despite these challenges, GemFair represents a substantive and relatively well-documented attempt to address one of the most persistent structural problems in the coloured-gemstone trade: the near-total absence of verifiable provenance for the majority of material that reaches the market. For buyers — whether jewellery brands, dealers, or retailers — GemFair-certified material offers a level of supply-chain documentation that is genuinely unusual in the coloured-gemstone sector. For the broader industry, the platform's development and the lessons it generates contribute to an evolving body of knowledge about what responsible ASM integration can look like in practice.

The initiative also reflects a broader shift in how major industry actors understand their responsibilities and opportunities in relation to the informal mining sector — moving from a posture of distance or disengagement towards one of structured, if commercially motivated, partnership. Whether GemFair achieves durable scale and measurable impact for mining communities in Sierra Leone and potentially beyond will depend on continued investment, market support, and the willingness of the trade to treat provenance documentation as a genuine differentiator rather than a marketing footnote.

Further Reading

• Gemfields: GemFair Programme Overview
• Responsible Jewellery Council
• OECD Due Diligence Guidance for Responsible Mineral Supply Chains