The Diamond Guide: Lab-Grown vs Natural

DHARIN Education Series

The Lab-Grown Diamond Guide

A clear guide to lab-grown diamonds — how they compare with mined diamonds, moissanite and simulants, how certification works, and what to consider when choosing 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.

🔷 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 (0.5ct+) IGI / GIA Gem report None
Price (1ct guide) £300–£700 £3,000–£8,000 £100–£250 £5–£30
Ethical / eco rating ★★★★★ ★★☆ ★★★★ ★★★

← swipe to see full table →

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
TraceableConsidered
origin
0.50ct+Individual report
where stated

A lab-grown diamond is identical to a mined diamond in chemical composition, physical structure and optical properties. Both are graded using the same 4C 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.

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.

Do DHARIN lab-grown diamonds come with individual certification?

Lab-grown diamonds of 0.50 carat and above used as the principal centre stone are accompanied by an individual grading certificate where stated on the product page. Smaller lab-grown diamonds, accent stones and pavé-set diamonds do not include individual certificates. Independent third-party verification can be arranged upon request. All related testing, certification and shipping costs are borne by the customer.

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. DHARIN chooses lab-grown diamonds as a more traceable, considered alternative to traditional mining. Independent environmental impact varies by producer and energy source.

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