Sell diamonds internationally.

What we buy and where buyers are

OnePiece facilitates diamond transactions across the full value chain: run-of-mine rough from African producers, sorted and graded rough parcels, polished stones from cutting centres, and large exceptional gems for institutional or collector placement. Our buyer network spans Antwerp (the world's rough diamond capital), Dubai's DMCC Diamond Exchange, Mumbai and Surat's cutting and trading community, and Singapore's growing Asian precious stone market.

The most active demand in our network is for rough gem-quality diamonds from African origin — Botswana, Angola, Namibia, Sierra Leone, and Lesotho material commands the strongest buyer interest. For sellers with Kimberley Process documentation and an independent grading report, we can connect you with a qualified buyer within days.

The Kimberley Process — what every seller must know

The Kimberley Process Certification Scheme (KPCS) is the international certification framework for rough diamonds. Any rough diamond that enters international trade must be accompanied by a Kimberley Process certificate issued by a participating country's governmental authority. Without a KP certificate, rough diamonds cannot legally be imported into the 82 participating countries that cover essentially the entire institutional market.

If your diamonds have a valid KP certificate from an originating country's authority, you are in the formal trade. If not — if your diamonds came from an informal channel or a non-participating region — they cannot be placed with institutional buyers and we cannot assist. The institutional buyers in our network are fully KP-compliant and will not transact without documentation.

For artisanal producers without KP access, the pathway is through a licensed dealer or exporter in your country who can consolidate and certify your parcel. WhatsApp us — we can advise on the formalisation route specific to your country.