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.
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.
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.
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.
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 / How it's made | 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
Why Lab-Grown Diamonds
A real diamond, without the mining premium. Here is what that means in practice.
vs mined
composition
footprint
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, by contrast, 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?
Are cultivated gemstones real gemstones?
Do DHARIN stones come with certification?
How is moissanite different from a lab-grown diamond?
Will a lab-grown diamond fade or cloud over time?
Are lab-grown stones ethical and sustainable?
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