Lab-Grown Diamonds Guide

Lab-Grown Diamonds: The Complete Guide

Everything you need to know before you buy — from how lab diamonds are made to how they compare with mined stones.

What Is a Lab-Grown Diamond?

A lab-grown diamond is a real diamond — same chemical composition, same crystal structure, same sparkle — grown in a laboratory instead of mined from the earth. It's not a simulant like cubic zirconia or moissanite. Under a jeweller's loupe, and even in most professional testing, a lab diamond and a mined diamond are indistinguishable.

Because they're created in controlled conditions rather than pulled out of the ground, lab-grown diamonds typically cost 30-60% less than equivalent mined stones. That's why more and more couples are choosing them for engagement rings and fine jewellery.

How Lab Diamonds Are Made

There are two main processes:

  • HPHT (High Pressure, High Temperature): mimics the natural conditions deep in the earth — carbon is pressed under intense heat and pressure until it crystallises.
  • CVD (Chemical Vapour Deposition): a diamond seed is placed in a chamber of carbon-rich gas, where layers of diamond slowly grow.

Both take several weeks to produce a gem-quality rough stone, which is then cut and polished exactly like a mined diamond.

Lab-Grown vs Mined Diamonds

  • Identical beauty: same 4Cs — cut, colour, clarity, carat.
  • Ethical and sustainable: no mining, no conflict diamonds, far smaller environmental footprint.
  • Better value: you get a larger, higher-quality stone for the same budget.
  • Certified: every stone comes with a grading report, same as mined.

Diamond Education Guides

Shop Lab-Grown Diamonds

Browse our lab-grown collections — every piece is crafted with certified, conflict-free lab-grown diamonds.

Questions? Talk to our jewellery team — we're happy to walk you through every option.