Is a Lab-Grown Diamond a Real Diamond? The Complete, Honest Answer

Short answer: yes. A lab-grown diamond is a real diamond — not cubic zirconia, not moissanite, not a simulant of any kind. Here is the full answer, because you deserve more than a sales line.

Chemically, Physically, Optically Identical

A diamond is crystallised carbon. A lab-grown diamond is crystallised carbon. The atomic structure, the 10/10 Mohs hardness, the refractive index that creates that unmistakable fire — all identical. The US FTC formally recognises lab-grown diamonds as diamonds, and grading laboratories including IGI certify them on exactly the same 4C standards as mined stones.

How They're Made

Two methods dominate. HPHT (High Pressure, High Temperature) recreates the conditions of the earth's mantle. CVD (Chemical Vapour Deposition) grows the crystal layer by layer from carbon-rich gas. Both take weeks rather than millions of years — and both produce genuine diamond, distinguishable from mined stones only with specialised laboratory equipment.

How It's Different From Simulants

• Cubic zirconia — a different material entirely; softer, clouds over time.
• Moissanite — silicon carbide; brilliant, but with a distinct rainbow-like fire and different hardness.
• Lab-grown diamond — actual diamond. Passes a diamond tester, because it is one.

Why Buyers Are Switching

Price is the honest driver: 60–80% less than an equivalent natural stone, which puts a genuinely well-cut, well-graded 1-carat-plus diamond within reach for pieces like engagement rings and diamond mangalsutras. Add certified grading, and there is no compromise hiding in the discount.

What to Insist On

Certification, always. Every stone in our rings, earrings, necklaces and men's studs ships with an IGI report you can verify independently online — read our guide to reading an IGI certificate before you buy anywhere.