The Diamond & Gemstone Guide: Lab-Grown vs Natural

DHARIN Education Series

The Lab-Grown Advantage

A clear guide to lab-grown diamonds and cultivated gemstones — how they compare to mined stones, moissanite and simulants, and why they are the considered choice for modern fine jewellery.

Know What You Are Buying

Several stones can look alike in a setting. Here is what each one actually is — so you can choose with confidence.

💎 The DHARIN Choice

Lab-Grown Diamond

A genuine diamond, grown in a laboratory rather than mined. Chemically, physically and optically identical to a natural diamond — pure crystallised carbon, independently certified by IGI or GIA.

🔷 Mined

Natural Diamond

Formed deep in the earth over billions of years. A real diamond in every sense, but carrying a far higher price driven by mining cost and scarcity rather than by quality.

✨ Alternative

Moissanite

Silicon carbide (SiC) — not a diamond, but a popular look-alike. Brighter, more rainbow-like fire and a lower price, though it is a different material with different properties.

🔸 Simulant

Cubic Zirconia

An inexpensive diamond simulant. Softer, less brilliant, and prone to clouding and scratching over time. Suitable for costume pieces rather than fine jewellery.

Full Comparison

The dimensions that actually matter when choosing a stone for fine jewellery.

Property Lab-Grown Diamond ★ Natural Diamond Moissanite Cubic Zirconia
Composition Pure carbon Pure carbon Silicon carbide Zirconium dioxide
Origin Grown in a lab Mined from earth Lab-created Lab-created
Is it a real diamond? ✓ Yes ✓ Yes No No
Mohs hardness 10 / 10 10 / 10 9.25 8.5
Brilliance Classic white Classic white Rainbow fire Glassy
Lasts a lifetime ✓ Yes ✓ Yes ✓ Yes Clouds over time
Certification IGI / GIA IGI / GIA Gem report None
Price (1ct guide) £300–£700 £3,000–£8,000 £100–£250 £5–£30
Ethical / eco rating ★★★★★ ★★☆ ★★★★ ★★★

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Mohs hardness — closer to 10 means more scratch-resistant

Lab-Grown Diamond

10.0
Natural Diamond

10.0
Moissanite

9.25
Cubic Zirconia

8.5

Why Lab-Grown Diamonds

A real diamond, without the mining premium. Here is what that means in practice.

10×Better value
vs mined
100%Identical
composition
99%Lower carbon
footprint
IGICertified
every stone

A lab-grown diamond is identical to a mined diamond in chemical composition, physical structure and optical properties. Both GIA and IGI certify lab-grown diamonds using the same 4C grading standard — colour, clarity, cut and carat. The only difference is origin: created in a laboratory rather than mined from the earth.

Put simply — a natural diamond forms deep underground over billions of years, while a lab-grown diamond is created in a few weeks in a controlled lab that recreates the same heat and pressure. Same carbon, same crystal, same sparkle. Moissanite and cubic zirconia are also made in a lab, but from entirely different materials — which is why they are diamond alternatives, not diamonds.

That single difference is what lets you own a larger, higher-grade stone for the same budget — with a transparent supply chain and a far smaller environmental footprint. It is the same diamond, chosen for better reasons.

It is worth being clear about the gap between these stones. A lab-grown diamond is the only one that is genuinely a diamond — so close to a natural diamond that even an experienced jeweller cannot tell them apart without specialist equipment. Moissanite and cubic zirconia are a different matter: side by side with a real diamond, the difference is visible to the naked eye. Moissanite throws an obvious rainbow-coloured fire, while cubic zirconia looks glassier and lacks a diamond's depth and life. They imitate the look — a lab-grown diamond simply is one.

Cultivated Gemstones

Beyond diamonds, DHARIN works with lab-grown coloured gemstones — chemically identical to their mined counterparts, with purer colour and an ethical origin.

Sapphire

Lab-Grown Corundum

The same crystallised aluminium oxide as a natural sapphire, with the same hardness (Mohs 9). Cultivated stones offer a cleaner, more consistent blue — the colour long favoured in British fine jewellery.

Emerald

Lab-Grown Beryl

A true emerald, grown rather than mined. Fewer inclusions than most natural stones, delivering a vivid, even green with greater clarity and a far gentler price.

Ruby

Lab-Grown Corundum

Identical in composition to a natural ruby, with a rich, saturated red. Cultivation avoids the ethical concerns associated with some mined ruby sources.

Property Cultivated Gemstone Natural Gemstone
Composition Identical to natural Same mineral
Is it a real gemstone? Yes — a true gem Yes
Colour Pure & consistent Varies by source
Clarity Fewer inclusions Often included
Origin Grown in a lab Mined from earth
Ethical sourcing Fully traceable Can be uncertain
Price Far more accessible Premium

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Because they share the exact crystal structure of mined gems, cultivated gemstones are real gemstones — not imitations. The distinction is origin alone, certified and disclosed on every DHARIN piece.

Frequently Asked Questions

Is there a real difference between lab-grown and natural diamonds?

There is no chemical difference. Both are pure carbon with the same crystal structure, both rate 10 on the Mohs scale, and their optical properties are identical. Even a professional gemmologist cannot tell them apart by eye — specialist equipment is needed to detect the subtle differences in their growth features.

Are cultivated gemstones real gemstones?

Yes. A lab-grown sapphire, emerald or ruby has the same chemical composition and crystal structure as its mined equivalent, so it is a genuine gemstone — not a simulant or imitation. The only difference is that it was grown in controlled conditions rather than mined, which often results in purer, more consistent colour.

Do DHARIN lab-grown diamonds come with IGI certification?

Yes. Every DHARIN lab-grown diamond is accompanied by an independent IGI certificate that details carat weight, colour grade, clarity grade and cut grade — using the same grading standard applied to natural diamonds — and explicitly identifies the stone as lab-grown. Cultivated gemstone pieces disclose the lab-grown origin and stone species on each product.

How is moissanite different from a lab-grown diamond?

Moissanite is silicon carbide (SiC), not carbon, so it is not a diamond. It is slightly softer (9.25 on Mohs vs 10) and produces more intense rainbow-coloured fire, which some find striking but others find less understated than a diamond's classic white brilliance. It costs less than a lab-grown diamond, but it is a different material entirely.

Will a lab-grown diamond fade or cloud over time?

No. A lab-grown diamond has exactly the same durability as a natural diamond — Mohs 10, the hardest known material. It will not scratch with everyday wear and will not change colour or cloud over time. Cubic zirconia, by contrast, rates 8.5 on Mohs and develops fine surface scratches that progressively dull its brilliance over the years.

Are lab-grown diamonds and cultivated gemstones ethical and sustainable?

Yes. Lab-grown diamonds and cultivated gemstones are produced without mining — eliminating land disturbance, water depletion, and labour risks associated with extraction. When produced using renewable energy, the carbon footprint is approximately 99% lower than a mined equivalent. Full supply chain traceability is a founding principle of DHARIN.

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Every stone, certified.
Every piece, made to last.

Lab-Grown Diamonds Cultivated Gemstones