Diamond Guide

Lab-Grown Diamonds: The Complete Guide

Real diamonds, grown in weeks instead of billions of years — for a fraction of the price. What lab-grown diamonds are, whether they're real, how they're made, cost, certification, and if they're worth it.

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Lab-grown diamond engagement ring by Aquamarise

Published July 3, 2026 10 min read

A decade ago they were a curiosity; today lab-grown diamonds account for a huge share of engagement rings. They're identical to mined diamonds in every physical way, cost a fraction of the price, and skip the mine entirely. But are they "real"? Do they hold value? And are they right for you? This complete guide answers every question — and links to deeper dives on each topic.

Lab-Grown Diamonds at a Glance

What they are: real diamonds (pure carbon, Mohs 10).
Not: simulants like cubic zirconia or moissanite.
Made by: HPHT or CVD, in weeks.
Price: typically 60–90% less than mined.
Trade-off: lower resale value.

What Is a Lab-Grown Diamond?

A real diamond, grown above ground.

A lab-grown diamond is a genuine diamond created in a controlled laboratory rather than mined from the earth. It's pure crystallized carbon with the exact same chemical, physical, and optical properties as a mined diamond — the same brilliance, fire, and Mohs 10 hardness. The only difference is how it was formed: in weeks in a lab, rather than over billions of years underground. Explore ours in lab-grown diamond engagement rings.

Are Lab-Grown Diamonds Real Diamonds?

Yes — and this is the key point.

Lab-grown diamonds are 100% real diamonds. They are not diamond simulants like cubic zirconia or moissanite, which are entirely different materials that only imitate a diamond's look. A lab-grown diamond is chemically and structurally identical to a mined one, which is why even a trained jeweler can't tell them apart by eye — distinguishing them requires specialized laboratory equipment. Regulators and gem labs classify them as diamonds, full stop.

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Lab-Grown Diamond Rings

Handcrafted, made to order, and IGI-certified — genuine diamonds for a fraction of the mined price.

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How Lab-Grown Diamonds Are Made

Two methods, one real diamond.

There are two ways to grow a diamond, both producing a genuine stone:

HPHT (High Pressure, High Temperature) — recreates the earth's conditions, using extreme heat and pressure to crystallize carbon around a tiny diamond seed.
CVD (Chemical Vapor Deposition) — grows a diamond layer by layer from a carbon-rich gas at lower pressure; common for gem-quality stones today.

Either way, the result is real diamond, formed in weeks rather than eons. For the full science, see how lab-grown diamonds are made.

Lab-Grown vs Natural Diamonds

Identical in the ways that count.

Side by side, a lab-grown and a mined diamond of the same specs look and perform identically — same sparkle, same hardness, same durability. The differences are origin, price, and rarity: mined diamonds carry a natural, billion-year story and hold more resale value, while lab-grown diamonds offer the same beauty for far less and a lower environmental footprint. For a full breakdown, see lab-grown vs natural diamond.

The 4 Cs & Certification

Graded exactly like mined diamonds.

Lab-grown diamonds are graded on the same four Cs — cut, color, clarity, and carat — as mined diamonds, and quality varies just as much, so certification matters. Most lab-grown diamonds are certified by IGI, with some by GIA; a reputable stone comes with a report and a laser-inscribed certificate number. To understand the labs, see IGI vs GIA certification.

Price: How Much Cheaper?

The headline advantage.

A lab-grown diamond typically costs 60–90% less than a mined diamond of the same size and quality — and prices have fallen sharply as production scaled (down roughly 74% since 2020). In practice, that means a bigger, cleaner, whiter stone for the same budget, or the same look for far less. See real numbers in our lab-grown diamond price guide.

Pros & Cons

An honest look.

Pros

A genuine diamond, identical to mined
60–90% more affordable
Bigger or higher quality for your budget
Conflict-free with a lower footprint
Fully certified and traceable

Cons

Lower resale value than mined
Not a financial investment
Prices may keep falling
Lacks a mined stone's rarity/story
Production uses energy

Are Lab-Grown Diamonds Worth It?

For most buyers, yes.

If you want the beauty, durability, and prestige of a real diamond and would rather have a larger or finer stone (or simply spend less), a lab-grown diamond is an excellent choice. The main reason to choose mined is if resale value or natural rarity matters most to you. Dig deeper in are lab-grown diamonds worth it? and do they hold value?

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Lab-Grown Diamond FAQ

Are lab-grown diamonds real diamonds?

Yes. Lab-grown diamonds are real diamonds — pure crystallized carbon with the exact same chemical, physical, and optical properties as mined diamonds, including a Mohs hardness of 10. They are not simulants like cubic zirconia or moissanite, which are different materials. The only difference is origin: lab-grown diamonds are created in a controlled lab in weeks, while mined diamonds formed in the earth over billions of years. Even gemologists need specialized equipment to tell them apart.

Is it worth buying a lab-grown diamond?

For many buyers, yes. A lab-grown diamond looks identical to a mined one but costs far less — typically 60–90% cheaper — so you can get a larger or higher-quality stone for the same budget, or spend less overall. They're also a conflict-free, lower-impact choice. The main trade-off is resale value, which is lower than mined diamonds. If you value size, quality, ethics, and price over resale, a lab-grown diamond is well worth it.

What is the downside of lab-grown diamonds?

The main downside is resale and long-term value. Because lab-grown diamonds can be produced in quantity and their prices have fallen quickly, they hold less resale value than mined diamonds, and they aren't a financial investment. Some buyers also prefer the rarity and 'billion-year' story of a mined stone. Otherwise, lab-grown diamonds are optically and physically identical to mined diamonds, so there's no downside to their beauty or durability.

Are lab-grown diamonds cheaper than natural diamonds?

Yes, significantly. A lab-grown diamond typically costs 60–90% less than a mined diamond of the same size and quality, and prices have dropped further as production has scaled — down around 74% since 2020. That affordability is the main reason lab-grown diamonds have become so popular: you can buy a bigger, cleaner, whiter stone for the same money, without compromising on it being a genuine diamond.

How are lab-grown diamonds made?

Lab-grown diamonds are created by two methods. HPHT (High Pressure, High Temperature) mimics the earth's conditions, using extreme heat and pressure to crystallize carbon around a diamond seed. CVD (Chemical Vapor Deposition) grows a diamond layer by layer from a carbon-rich gas at lower pressure. Both produce genuine diamonds; CVD is common for gem-quality stones today. The whole process takes weeks rather than the billions of years mined diamonds require.

Can you tell a lab-grown diamond apart from a mined one?

Not by eye — not even a trained jeweler can reliably tell them apart just by looking, because they are the same material with the same sparkle and fire. Distinguishing them requires specialized laboratory equipment that detects tiny differences in trace elements and growth patterns. Reputable lab-grown diamonds are also laser-inscribed with a certificate number, so their origin is fully documented and transparent.