The Kimberley Process Explained: What It Does, and Does Not, Guarantee
Updated: 3 days ago
The Kimberley Process is a UN-backed international scheme designed to prevent conflict diamonds from entering the legitimate rough-diamond trade.
It has created an important system of controls, but its scope is narrower than many buyers realise. A diamond described as “Kimberley Process compliant” is not automatically traceable to a particular mine, free from every human-rights concern or environmentally responsible.
Understanding that distinction helps buyers ask better questions rather than relying on one reassuring phrase.
What Is the Kimberley Process?
The Kimberley Process Certification Scheme, usually shortened to KPCS, was launched in 2003 following international concern about rough diamonds being used to finance armed conflicts.
Under the definition used by the scheme, conflict diamonds are rough diamonds used by rebel movements or their allies to finance conflict intended to undermine legitimate governments.
The official Kimberley Process currently comprises 60 participants representing 86 sovereign states, with the European Union participating as one member. Together, its participants account for more than 99% of the global production and trade in rough diamonds.
How Does the Kimberley Process Work?
Participating countries must establish national controls governing the import and export of rough diamonds.
The central requirements include:
trading rough diamonds only with other Kimberley Process participants;
ensuring qualifying international shipments carry a validated Kimberley Process certificate;
maintaining appropriate import and export controls;
exchanging statistical information; and
meeting the scheme’s minimum requirements.
The system operates between governments and applies to international shipments of rough diamonds. It was designed to prevent rough diamonds connected with rebel-financed conflict from entering legitimate trade channels.
The European Commission’s explanation of the Kimberley Process provides further information about these requirements.
Does the Kimberley Process Apply to Polished Diamonds?
The Kimberley Process regulates the international trade in rough diamonds. Its certificates accompany qualifying shipments rather than remaining permanently attached to each individual diamond after cutting and polishing.
A retail customer buying a polished diamond will not normally receive the original Kimberley Process certificate for that particular stone.
This is also different from a gemmological grading report. A laboratory report may describe a diamond’s weight, colour, clarity, cut and other characteristics, but it does not ordinarily establish whether the diamond was responsibly mined.
You can learn more about the purpose and limitations of laboratory documentation in my Gem Certification Guide for Collectors.
Does the Kimberley Process Guarantee an Ethical Diamond?
No. It addresses a particular form of conflict financing, but the word ethical can cover a much wider range of concerns.
The scheme does not, by itself, guarantee:
safe or fair working conditions;
fair pay for miners;
the absence of child or forced labour;
responsible environmental practices;
benefits for local mining communities;
freedom from every form of violence or human-rights abuse;
traceability to a particular mine;
responsible cutting and manufacturing conditions; or
that a diamond is fairly priced.
This does not make the Kimberley Process meaningless. It means its protection should be understood accurately rather than presented as a complete ethical guarantee.
“Conflict-Free” and “Ethically Sourced” Are Not the Same
These expressions are often used interchangeably, but they do not necessarily mean the same thing.
Within the Kimberley Process, conflict diamond has a specific and relatively narrow definition connected with rough diamonds used by rebel movements or their allies to finance conflict against legitimate governments.
An ethically sourced diamond is a broader claim. A buyer may reasonably expect it to address working conditions, human rights, environmental impact, community welfare and traceability.
If a seller describes a diamond as ethical, ask what that statement means in practice and what evidence supports it.
What Should Diamond Buyers Ask?
The objective is not to demand certainty where it cannot be provided. It is to understand exactly what is known, what is being claimed and where the information comes from.
Before buying, consider asking:
What does “conflict-free” mean in this instance?
Establish whether the seller is referring only to Kimberley Process compliance or to wider sourcing standards.
Can the diamond be traced beyond the general supply chain?
Some diamonds have documented country, mine or producer information. Others do not.
What documentation supports the sourcing claim?
Ask whether the information applies to this particular diamond, a parcel of diamonds or simply the retailer’s overall purchasing policy.
Which due-diligence standards does the supplier follow?
A clear explanation is more useful than a collection of unexplained logos.
What does the laboratory report establish?
Do not confuse a diamond grading report with ethical or geographic traceability.
Has the diamond previously been owned?
Recycled, antique and inherited diamonds may appeal to buyers who prefer not to create new mining demand, although their original source may still be unknown.
Is a traceable natural or laboratory-grown alternative available?
Each option has its own sourcing, energy, labour and disclosure questions. None should be treated as automatically ethical without supporting information.
Should You Avoid Natural Diamonds?
Not necessarily. Responsible natural-diamond production can support employment, national revenue and local communities. The difficulty is that conditions and traceability vary considerably across the industry.
The most useful approach is to avoid sweeping assumptions. A natural diamond is not automatically unethical, just as a laboratory-grown or recycled diamond is not automatically impact-free.
What matters is the evidence behind the claims being made.
The Buyer’s Most Important Question
When a seller says a diamond is “conflict-free” or “ethically sourced”, ask:
What exactly does that claim guarantee, and how can it be verified?
A responsible seller should be able to explain the limits of their knowledge as clearly as the strengths of their sourcing process.
The Kimberley Process provides an important foundation for controlling the international rough-diamond trade. However, informed buyers should treat it as one part of responsible sourcing rather than the final word.
If you would like independent guidance when selecting a significant diamond or coloured gemstone, explore my independent gemstone sourcing service.
I work for the buyer, not the seller, and do not accept commission from gemstone sellers.
Information reviewed: September 2026
Kim Rix GG GIA
Independent Gemstone Sourcing Specialist
Gemstone Detective
