How Are Lab-Grown Diamonds Made?

Lab-grown diamonds are created using technology that reproduces the conditions under which diamonds form naturally — just compressed into weeks instead of billions of years, and done above ground instead of deep in the earth.

Two Established Methods

Most lab-grown diamonds are made using either High Pressure High Temperature (HPHT), which mimics the intense heat and pressure of the earth's mantle, or Chemical Vapour Deposition (CVD), which builds a diamond up, layer by layer, from carbon-rich gas. Both produce genuine crystalline diamond.

From Rough to Polished

Once grown, a rough lab-grown diamond goes through exactly the same cutting, polishing and grading process as a mined stone. Nothing about the finishing process differs by origin.

Why the Process Matters

Because the growth process happens in a controlled setting, it's far easier to document and verify — which is part of why lab-grown diamonds pair so naturally with transparent, certified sourcing.