Lab-grown vs natural diamonds.

A lab-grown diamond is a diamond. It has the same crystal structure, the same chemical formula (pure carbon), the same hardness, the same refractive index, and the same sparkle as a diamond pulled from the ground. Under a jeweller's loupe, side by side, they look identical. Standard tests read them as diamond because they are diamond.

The only reliable way to tell them apart is with specialised lab equipment that reads the tiny growth patterns left behind by how the crystal formed. That is why grading labs like IGI note origin on the report and often laser-inscribe the girdle. Nothing about the finished stone is fake or simulated.

Growth starts with a small diamond seed placed in a controlled chamber. Over several weeks the seed grows into a rough crystal, using one of two proven methods. HPHT recreates the pressure and heat found deep in the earth. CVD uses a plasma of carbon-rich gas that lets atoms settle onto the seed layer by layer.

Both methods produce real diamond rough. From there the process is the same as any other diamond: the rough is planned, cut, and hand polished by cutters, then sent for independent grading.

Three things are meaningfully different: origin, supply, and price. A lab-grown diamond has a clearer, shorter origin story. There is no mining, no long extraction chain, and no country-of-origin ambiguity. Supply is also less volatile, which shows up in pricing.

At the same cut, colour, and clarity, a lab-grown diamond typically costs a fraction of a mined equivalent. That gap is not a discount on quality. It is what you save by removing the parts of the supply chain that never touched the stone itself.

A fair question. Fine jewellery in general is a poor short-term investment. Mined diamonds have historically held resale value better than lab-grown ones, but resale is still usually a fraction of retail for either. If long-term liquidity is the priority, treat the piece the way you would any luxury purchase.

If wearing a beautiful, well-cut stone is the priority, lab-grown lets more of your budget go into cut quality, size, and design.

Every diamond in the Vault is lab-grown, IGI certified, and reviewed in person before it is listed. We chose lab-grown because we can be more certain about how the stone came to exist, and because the pricing structure lets us offer serious cut quality without pushing you into a smaller stone than you wanted.

If a mined stone is right for you, we will say so. Our job is to help you land on the right stone, not to defend a category.