Natural diamonds, GIA certified.

Truce & Co. now sets natural diamonds alongside our lab-grown selection. Every natural stone we set is independently graded by the Gemological Institute of America. The bespoke commission is the same. The choice of stone is yours.

What a natural diamond is

A natural diamond is pure carbon, crystallised over a billion years and more, between 140 and 190km beneath the Earth's mantle, under pressures and temperatures that no laboratory recreates by accident. The stones we set were lifted from mines in Botswana, Russia, Canada, or South Africa, cut and polished by master cutters in Antwerp, Mumbai or Tel Aviv, then graded against the world's most exacting standard.

GIA certification, and why it matters here

The Gemological Institute of America has graded diamonds since 1953 and originated the four Cs as a public vocabulary. Every Truce & Co. natural diamond arrives with a GIA Diamond Grading Report covering carat, colour (D to Z), clarity (FL through I3), cut grade (Excellent through Poor), polish, symmetry, fluorescence, and a plotted diagram of internal characteristics. Every stone is laser-inscribed with its certificate number on the girdle for verification under loupe.

GIA versus IGI

GIA is the standard for natural diamonds. IGI grades both natural and lab-grown but is the practical industry standard for lab-grown specifically. Both are independently verified, both are accepted by jewellers and insurers worldwide. We choose GIA for natural and IGI for lab-grown because that is where each authority is strongest.

Provenance, the Kimberley Process, and what to ask

Mined diamonds carry traceability through the Kimberley Process Certification Scheme, ratified in 2003. The scheme was designed to prevent conflict diamonds entering the supply chain and has narrowed that window meaningfully. It is not a complete provenance system. Certification typically goes back to the country of cutting, not the mine. We work with suppliers who additionally provide mine-of-origin documentation where the rough was bought directly from a producer (De Beers, Alrosa, Rio Tinto). Ask us, and we will tell you what we know about your specific stone.

When natural makes more sense than lab-grown

Natural diamonds hold their resale value better than lab-grown. The secondary market is older, the supply is bounded, and the cultural premium remains. They also signal heritage in a way lab-grown does not yet, and for some clients that signal is the point. If your priority is investment, tradition, or signalling, natural is often the more rational choice.

When lab-grown makes more sense

Lab-grown is roughly 40 to 60 percent less expensive than natural for an equivalent grade. The same budget buys a meaningfully larger or finer stone. Provenance is fully traceable to the laboratory, the month, and the growth method. If your priority is wearing the most beautiful stone you can afford, or if origin transparency matters more to you than resale, lab-grown is often the more rational choice.

A fair comparison, in 2026 pounds

A 2.0 carat round brilliant, G colour, VS1 clarity, Excellent cut. Lab-grown loose: £2,200 to £3,500. Natural loose: £9,000 to £14,000. The same metalwork either way: a platinum solitaire on a knife-edge band adds £1,500 to £2,200 of casting, hand-finishing, stone-setting and London Assay Office hallmarking. Finished engagement ring: £3,800 to £5,800 lab-grown, £10,500 to £16,500 natural. Both look identical to the naked eye.

Why we now offer both

We started with lab-grown because the equivalence at the wearer end was complete and the provenance was meaningfully better. Both remain true. We are adding natural because clients ask for it, and because pretending one is a substitute for the other is not honest about what each represents. The bespoke process is the same. The diamond is your decision. Read our companion piece on lab-grown diamonds and how they are graded.

Caring for a natural diamond

Wash with warm water, a little washing-up liquid and a soft toothbrush; rinse and pat dry. Avoid wearing during heavy manual work, while applying lotion, or in chlorinated pools. Bring the piece back to us once a year for a professional clean, an ultrasonic if appropriate, and a check on the setting. Included indefinitely with every piece we make.

Contact

Email: info@truce.diamonds
WhatsApp: +44 7988 479869
London, United Kingdom