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How Are Lab-Grown Diamonds Made?
A lab-grown diamond is a real diamond. It shares the exact carbon crystal structure of a mined stone — the only difference is origin. Here is how science recreates the conditions of the earth.
Every diamond — mined or grown — is pure carbon arranged in a precise lattice. In nature this takes one to three billion years under immense heat and pressure deep below the surface. In a laboratory, the same result is achieved in a matter of weeks, using one of two refined methods.
The two ways diamonds are grown
HPHT — High Pressure, High Temperature
A tiny diamond seed is placed with pure carbon and exposed to roughly 1,500°C and pressures above 870,000 psi — mirroring the earth's mantle. The carbon melts and crystallises onto the seed, growing the diamond layer by layer.
CVD — Chemical Vapour Deposition
A seed is placed in a sealed chamber filled with carbon-rich gas. Energised into a plasma, the gas releases carbon atoms that settle onto the seed and build the crystal, atom by atom — allowing exceptional purity and control.
From seed to set stone
The seed
Growth begins with a thin slice of diamond — the foundation the new crystal forms upon.
Growth
Over several weeks, carbon bonds onto the seed under HPHT or CVD conditions to form a rough diamond.
Cutting & polishing
Master cutters shape the rough by hand to reveal its brilliance — exactly as with a mined diamond.
Grading
Each finished stone is independently certified by a laboratory such as GIA or IGI.
“Lab-grown and mined diamonds are identical in chemistry, hardness, sparkle and durability. Only specialised equipment can tell them apart — and only by origin.”
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