Are Lab-Grown Diamonds "Real"? Understanding the Science of Modern Luxury

Are Lab-Grown Diamonds "Real"? Understanding the Science of Modern Luxury

Last updated July 2026

In fine jewellery, there's one question that comes up more than any other: is it a real diamond? As a gemologist, I hear this daily at our Wembley showroom. The direct answer: yes, lab-grown diamonds are genuinely, unambiguously real diamonds.

They're not fakes, simulants, or a different crystal altogether. They're chemically, physically, and optically identical to a diamond pulled from the earth.

The Science Behind the Sparkle

Natural diamonds form over one to three billion years under intense heat and pressure deep within the earth's mantle. Lab-grown diamonds replicate that same fundamental process using genuine scientific technique, primarily Chemical Vapour Deposition (CVD) or High Pressure High Temperature (HPHT) growth.

Because the underlying conditions are the same, the resulting crystal structure is the same too. Under magnification, a lab-grown diamond shows identical brilliance, fire, and scintillation to a mined stone.

What the FTC Ruling Actually Says

This is worth being precise about, since it's often summarised too simply. In 2018, the US Federal Trade Commission revised its Jewelry Guides and removed the word "natural" from the formal definition of a diamond, effectively acknowledging that a diamond is defined by what it's made of, not where it came from. That's a genuinely significant ruling.

What it doesn't mean is that the word "diamond" alone is now interchangeable regardless of origin. The FTC still requires sellers to clearly and conspicuously disclose when a stone is lab-grown, placing a qualifying term directly alongside the word "diamond." Industry guidance following the ruling has also confirmed that "diamond" used entirely on its own is still generally understood to mean mined. So the accurate summary is: a lab-grown diamond is entitled to be called a diamond, full stop, but responsible disclosure of origin still matters, and always will with us.

How Do They Actually Compare?

Durability. Identical to mined diamonds, a perfect 10 on the Mohs hardness scale, the hardest known material, genuinely suited to daily wear for a lifetime.

Grading. Every diamond we offer is independently certified, primarily through IGI or GIA, held to the same international grading standards used for mined stones.

Visual beauty. To the naked eye, and even to most professional jewellers without specialised equipment, there's no visible difference. The brilliance that's made diamonds the defining symbol of commitment for generations is present either way.

The 2026 Shift: Why Origin Genuinely Matters Now

Modern luxury increasingly means something beyond price alone, it means values. Choosing a lab-grown diamond specifically allows for:

1. Ethics — full traceability and a conflict-free origin
2. Environmental consideration — genuinely lower impact than mining, though it's worth noting this still depends on the specific producer's energy source rather than being uniformly true across every stone
3. Value — the ability to choose a higher colour or clarity grade, or a larger carat weight, within the same budget a mined stone would otherwise consume

The VYOR Diamond Lab Difference

We don't just sell stones, we curate them. As gemologists, every diamond is hand-selected against our own criteria for fire and light return, beyond what a certificate alone can capture. Whether you visit us in Perth or design your ring entirely online, the diamond in front of you has been assessed properly, by someone who actually understands what makes a stone perform, not just what its paperwork says.

Visiting in Perth or designing remotely? Book a consultation, or start designing your ring online.