What the Kimberley Process Actually Certifies

The Kimberley Process Certification Scheme entered into force on 1 January 2003, after tripartite negotiations between governments, the diamond industry and civil-society observers that began in Kimberley, Northern Cape, South Africa, in May 2000. Its founding document defines the problem it addresses with precision: rough diamonds used by rebel movements to finance armed conflict against legitimate governments. The scheme does not address polished diamonds, jewellery, labour conditions in mines, environmental practice or any human-rights concern outside that one definition. Understanding the KPCS means reading what it says, not what its name implies.

Membership is open to any country that exports or imports rough diamonds and meets the scheme's minimum requirements: national legislation criminalising non-compliant trade, a system of internal controls, and the issuing of government-certified certificates for every shipment of rough diamonds crossing an international border. The scheme counts more than eighty member countries, which the Kimberley Process secretariat records as representing approximately 99.8 percent of global rough-diamond production. Each shipment must travel with a forgery-resistant certificate identifying the country of origin, the diamond count and total weight, and a declaration that the parcel contains no conflict diamonds as defined by the scheme.

The KPCS definition of a conflict diamond is narrow by design. A diamond mined under a government that uses revenue to commit abuses against its own population falls outside the definition, because the armed actor in that case is the state, not a rebel movement fighting it. This gap attracted sustained documented criticism following events in Zimbabwe's Marange diamond fields from approximately 2008 onward, when Human Rights Watch and other observers documented serious abuses at state-affiliated mining operations. Zimbabwe remained a KPCS participant throughout.

Enforcement is another documented limitation. The scheme operates on a peer-review system: member states conduct review visits to one another, but the process has no independent verification body and no power to impose sanctions beyond suspension. A member suspended for non-compliance — as Venezuela was in 2008 — may be reinstated once it demonstrates restored paperwork compliance, not independently verified mine-level control. The scheme's monitoring depends substantially on member self-reporting.

Civil-society observers, initially granted participation rights in the scheme's tripartite structure, have at times withdrawn in protest over specific decisions. Global Witness, one of the original advocacy groups whose 1998 report on Angola helped catalyse the KPCS negotiations, announced its withdrawal from the process in 2011, citing the scheme's inability to address the Zimbabwe situation as evidence that the existing definition had become an obstacle to meaningful reform.

The Kimberley Process certificate covers rough diamonds at the point of export and import. Once a parcel clears customs and enters the cutting and polishing pipeline — whether in Antwerp or Surat — the KPCS certificate has served its legal function. Individual stone tracking beyond that point is not a KPCS requirement, though some industry programmes, including the Responsible Jewellery Council's chain-of-custody standard, operate as voluntary layered systems on top of it. The GIA's laboratory services assess individual polished diamonds on their physical characteristics, rather than tracing them to a mine — a laboratory function entirely separate from the trade certification the scheme provides.

What the KPCS offers is documented: a government-to-government attestation that a shipment of rough diamonds crossed a border with a certificate in place. What it cannot attest to — working conditions, community impact, state-level governance — remains outside its mandate as written, and any reading of the scheme should begin there.