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OnCarat

A lab-grown diamond is a diamond. The same carbon, the same crystal lattice, the same hardness and the same fire as a stone from the ground, graded by the same laboratories against the same criteria. The only difference is where it formed.

We buy at the top of every scale, and the certificate in the box records exactly what you received.

Cut Excellent
Poor
Fair
Good
Very good
Excellent

The grade that decides whether a stone returns light through the top or loses it out of the bottom. We cut only at the top of the scale, because no other grade can compensate for a stone that sits flat.

Colour D to F
D
E
F
G
H
I
J
K

D through F is colourless, the highest range the scale recognises. Our stones sit inside it, so they read bright and white face up in yellow, rose and white gold alike.

Clarity FL to VS1
FL
IF
VVS1
VVS2
VS1
VS2
SI1
SI2

Eye-clean means nothing visible without magnification. We work well above that line, so our stones stay clean under a jeweller's loupe as well as across a room.

CaratAny weight, any shape

Every weight is available, in every shape we cut, and larger stones can be set to order. Elongated cuts — marquise, oval, pear and emerald — cover more of the finger for the same weight, so the shape you choose is as much a decision about presence as the carat is.

CertificationIGI

Every finished piece ships with an IGI certificate for the jewellery, recording the metal, the stones and their total weight. Diamonds of a carat and above carry their own IGI grading report, stating the cut, colour and clarity of that individual stone in writing.

Grown, not mined

High pressure high temperature recreates the conditions found underground. Chemical vapour deposition builds the crystal from carbon gas. Either way the result is diamond: 10 on the Mohs scale, refractive index 2.42, and the same dispersion that produces fire. A gemmologist cannot tell by eye; identification needs laboratory equipment reading growth patterns.

Because we choose each stone rather than take what a mine happens to yield, we buy only at the top of the scale. The colour and clarity we hold would be rare and heavily priced in a mined stone of the same size. Here it is the standard we work to, on every piece, and the certificate says so.

Diamond is the hardest material there is, mined or grown. It will outlast the hand it is given to, and the one after that. That is what you are buying.

Diamonds, priced by the carat

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