Purchases made during Christmas holidays will benefit from an extended returns policy. Purchases can be returned, in line with our policy, until 14th January 2022.
Orders for guaranteed Christmas Delivery cut-off date is 30th November.


150 Ashley Road, Hale,

Cheshire, WA15 9SA

0161 233 9977


Third Floor, St Johns Court, 19B Quay Street,

Manchester, M3 3HN

0800 080 3535


5 St Christopher’s Pl, Marylebone,

London, W1U 1NA

020 33 271 271

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Lab grown Diamonds

Synthetic diamonds are created in one of two ways. One mimics the way that natural diamonds are formed geologically: by applying extreme pressure and temperature to a vacuum chamber containing carbon, this dissolves to form diamond ‘seeds’. Rather than taking a billion years, this process takes 4 weeks, after which the stones are ready to be cut and polished. Another method is not dissimilar to 3D printing, whereby pieces of carbon are layered on a diamond seed in a vacuum chamber.

Cultured diamonds should not be confused with cubic zirconia and moissanite, which look similar to diamonds but are known as simulants. Simulants fetch much lower prices than man-made diamonds because they are not true carbon crystals and therefore do not possess the same physical or chemical properties as diamonds.

The benefits of buying a man-made diamond

The methods used to bring a stone to life are kinder to the planet than the scale of the mining involved to source a natural diamond, which incurs masses of air pollution and carbon dioxide emissions.

Then there is the traceability of a stone. At Steven Stone we only ever deal with natural diamonds that have a conflict-free guarantee. But with lab-grown stones there is never any need to question this, as their production involves a workforce of technicians as opposed to miners, meaning much greater transparency around working practices and conditions.

The differences between lab grown diamonds and natural diamonds?

Mined diamonds and lab-grown diamonds possess the same physical properties. Any differences are only visible under the scrutiny of a gemmologist using specialist equipment. The main point of difference is their provenance, in that natural diamonds are mined from the ground, and synthetic are produced in laboratories.