Responsible sourcing is a phrase used widely in the diamond industry. It appears on websites, in corporate reports, and on certificates. But what does it actually mean — and how do you know when it is real?
At its core, responsible sourcing is a commitment that every step of a diamond's journey, from mine to your hand, meets defined standards for ethics, labour, environmental impact, and community benefit. It is not a single certification or a one-time check. It is a system — layered, auditable, and ongoing — that holds every participant in the supply chain accountable for the conditions under which a diamond was extracted, cut, polished, and sold.
This article explains how that system works, where it falls short, and what it means specifically at Arete Diamond.
The Diamond Supply Chain: More Hands Than You Think
A natural diamond typically passes through five to ten separate entities before it reaches a retail jeweller. The chain usually looks something like this:
- Mine operator — extracts rough diamonds from kimberlite or alluvial deposits
- Rough dealer or sightholder — purchases rough stones directly from mining companies
- Cutting and polishing facility — transforms rough into finished gems, often in a different country
- Polished dealer or wholesaler — sorts, grades, and distributes finished stones
- Jewellery manufacturer — sets stones into finished pieces
- Retailer — presents the diamond to the buyer
Each handoff is a point where oversight can strengthen or fail. Responsible sourcing means that accountability is maintained at every one of these transitions — not just at the mine, and not just at the counter.
The Frameworks That Set the Standards
Responsible sourcing in diamonds is governed by several overlapping frameworks, each addressing a different layer of the problem.
The Kimberley Process Certification Scheme
Established in 2003, the Kimberley Process (KP) is an intergovernmental initiative that requires participating countries to certify that rough diamond shipments are conflict-free. Every parcel of rough diamonds crossing an international border must carry a KP certificate, and trading with non-participating countries is prohibited.
The Kimberley Process was a landmark achievement. It effectively closed the channels through which conflict diamonds — rough diamonds used to finance armed conflict against governments — entered the legitimate market. By most estimates, conflict diamonds have fallen from approximately 15% of the global trade in the late 1990s to well below 1% today.
But the KP has limitations. Its definition of "conflict diamond" is narrow: it covers diamonds used to fund rebel movements against recognised governments, but does not address other abuses — poor labour conditions, environmental damage, or human rights violations by state actors. Critics rightly point out that a diamond can be KP-certified and still come from a mine with troubling practices. (Conflict Diamonds & the Kimberley Process)
The Responsible Jewellery Council (RJC)
The RJC Code of Practices goes further than the Kimberley Process. It is a voluntary certification for businesses across the jewellery supply chain — miners, traders, cutters, and retailers — covering human rights, labour standards, environmental impact, product integrity, and governance.
RJC certification requires independent, third-party audits. Members must demonstrate compliance with standards that include fair wages, safe working conditions, anti-money-laundering procedures, and responsible environmental management. As of 2024, the RJC has over 1,400 certified members across more than 70 countries.
Mining Company Standards
The world's major diamond producers have developed their own sourcing frameworks that, in many cases, exceed the regulatory minimums.
De Beers' Best Practice Principles (BPPs) require all sightholders — the companies authorised to purchase rough diamonds directly from De Beers — to meet standards covering business ethics, labour rights, health and safety, and community development. Compliance is independently audited.
Rio Tinto (operator of the now-closed Argyle mine in Australia and Diavik mine in Canada) applied its own responsible mining framework, including detailed environmental rehabilitation plans and indigenous community agreements.
Petra Diamonds publishes annual sustainability reports covering safety metrics, environmental monitoring, and community investment for each of its operations.
These standards are not decorative. For a cutting or polishing business, losing sightholder status with a major producer can mean losing access to the majority of its rough supply. The commercial incentive to comply is significant.
Chain of Custody vs Chain of Origin
Two terms come up frequently in responsible sourcing conversations, and they are not the same thing.
Chain of custody tracks a diamond through documented handoffs from one entity to the next. It answers: Who held this diamond, and when? A strong chain of custody means every transaction is recorded, auditable, and attached to a specific stone or parcel.
Chain of origin (or provenance) goes further. It answers: Where was this specific diamond mined? This is harder to establish, because rough diamonds are often aggregated into mixed parcels at the mining stage, and those parcels are broken up and recombined as they move through cutting, polishing, and dealing.
For most diamonds on the market today, chain of custody is achievable. True mine-to-finger traceability — knowing exactly which mine produced a specific polished stone — is possible but remains the exception rather than the rule. Technologies like blockchain provenance tracking and diamond inscription are improving this, but they are not yet universal. (Traceability vs Origin Determination)
Responsible sourcing does not require perfect traceability to be meaningful. A diamond sourced through KP-certified channels, from an RJC-certified supplier, with documented chain of custody and adherence to best practice standards, is a responsibly sourced diamond — even if we cannot name the specific mine. Honesty about this distinction matters.
What Responsible Sourcing Means at Arete Diamond
We source our natural diamonds through established, auditable supply chains. Here is what that means in practice.
Our Requirements
- Kimberley Process compliance is non-negotiable. Every diamond we purchase is accompanied by the required certifications confirming it is conflict-free.
- RJC membership or equivalent standards are expected of our suppliers. We work with businesses that submit to independent auditing and meet internationally recognised ethical benchmarks.
- Chain of custody documentation must accompany every stone. We require our suppliers to maintain records of each handoff from rough acquisition through cutting, polishing, and sale.
- Known supply chain origins. While mine-level traceability is not possible for every stone, we source from suppliers whose rough diamond origins are limited to countries and operations with established responsible mining practices.
- Labour and environmental standards. We require our suppliers to demonstrate compliance with fair labour practices, safe working conditions, and responsible environmental management.
What We Do Not Claim
We believe transparency means being honest about what is achievable and what is not.
We do not claim that we can trace every diamond in our collection to the specific mine that produced it. The diamond supply chain is complex, and for many stones — particularly melee and smaller accent diamonds — mine-level provenance is not reliably trackable with current systems.
What we can say is that our supply chain is documented, audited, and limited to sources that meet the standards we require. We know who our suppliers are, how they operate, and what certifications they hold. And we are committed to adopting better traceability tools as they become available and reliable.
How Do I Know My Diamond Is Ethical?
This is the question every responsible buyer asks — and it deserves a careful answer.
Start with the certificate. A diamond graded by GIA, AGS, or another reputable laboratory has been independently evaluated. While the grading report itself confirms quality rather than ethics, it establishes that the stone has entered the documented supply chain.
Ask your jeweller about their sourcing. A responsible retailer should be able to explain where they source their diamonds, what standards their suppliers meet, and what certifications are in place. Vague answers — "our diamonds are ethically sourced" with no specifics — should prompt further questions.
Understand the frameworks. Knowing that the Kimberley Process covers conflict-free status, that the RJC certifies broader ethical practices, and that chain of custody differs from chain of origin gives you the vocabulary to evaluate claims critically.
Accept nuance. The diamond supply chain is not perfect. No responsible jeweller will tell you it is. What they should tell you is exactly what steps they take and where the limitations are. Honest complexity is more trustworthy than simple reassurance.
At Arete Diamond, we welcome these questions. We would rather have a longer conversation about sourcing than offer a shorter, emptier promise. (Transparency & Disclosure in the Diamond Industry)
The Work Still to Be Done
Responsible sourcing in the diamond industry has made genuine progress over the past two decades. The Kimberley Process reduced conflict diamond prevalence dramatically. The RJC raised the bar for ethical business practices. Major producers invested in community development, environmental management, and supply chain transparency.
But the work is not finished.
The Kimberley Process definition of conflict diamonds needs broadening to encompass a wider range of human rights concerns. Artisanal and small-scale mining — which accounts for a meaningful share of global production — remains difficult to monitor and certify. Full mine-to-market traceability for every diamond is still a goal, not a reality.
These are challenges the industry must continue to address. And they are challenges we follow closely at Arete Diamond, because responsible sourcing is not a standard we meet once and forget. It is a commitment we hold ourselves to as the standards evolve.
Summary
- Responsible sourcing means accountability at every step of the diamond supply chain — from mine to retailer — not just a single certification.
- The Kimberley Process ensures diamonds are conflict-free. The Responsible Jewellery Council sets broader standards for human rights, labour, environment, and governance.
- Chain of custody and chain of origin are different. Documented handoffs are standard; mine-level traceability is improving but not yet universal.
- Major mining companies set their own sourcing standards — including De Beers' Best Practice Principles — that sightholders must meet to retain access to rough supply.
- At Arete Diamond, responsible sourcing means KP compliance, RJC-standard suppliers, documented chains of custody, and transparent communication about what we can and cannot trace.
- Ask your jeweller specifics. The quality of the answer tells you as much as the answer itself.
Frequently Asked Questions
What does responsibly sourced diamond mean?
A responsibly sourced diamond has passed through a supply chain where every participant — from mine operator to retailer — meets defined standards for ethics, labour practices, environmental impact, and community benefit. This typically includes Kimberley Process certification and adherence to Responsible Jewellery Council standards.
What is the difference between chain of custody and chain of origin?
Chain of custody tracks documented handoffs of a diamond from one entity to the next, confirming who held the stone and when. Chain of origin goes further, identifying which specific mine produced the diamond. Chain of custody is standard practice; true mine-level traceability remains the exception.
How do I know if my diamond is ethically sourced?
Ask your jeweller about their specific sourcing standards — which certifications their suppliers hold (KP, RJC), whether they maintain chain-of-custody documentation, and what countries or operations their diamonds come from. Specific, detailed answers indicate genuine commitment; vague reassurances do not.
What is the Responsible Jewellery Council?
The RJC is a voluntary certification body for businesses across the jewellery supply chain. It requires independent, third-party audits covering human rights, labour standards, environmental impact, product integrity, and governance. As of 2024, it has over 1,400 certified members across more than 70 countries.
Related Reading
- Conflict Diamonds & the Kimberley Process — the history and mechanism behind conflict-free certification
- Transparency & Disclosure — what the industry is required and chooses to tell you
- Traceability vs Origin Determination — two approaches to proving where a diamond comes from
- Our Philosophy: What Makes Natural Diamonds Special — what makes natural diamonds special to Arete Diamond