Last updated: August 6, 2026 | Reviewed by Mydharin Gemological Team
Lab-grown and mined diamonds are chemically and optically identical — both are pure carbon in a cubic crystal structure. The key differences lie in origin, environmental footprint, and price. Lab-grown diamonds typically cost 50–80% less than equivalent mined stones, making luxury diamond jewellery more accessible without compromising quality.
What Are Lab-Grown Diamonds?
Lab-grown diamonds are created using two technologies:
- HPHT (High Pressure High Temperature) — replicates natural Earth conditions.
- CVD (Chemical Vapour Deposition) — grows diamond crystals layer by layer.
Lab-Grown vs Mined Diamonds: Key Comparison
| Factor | Lab-Grown Diamond | Mined Diamond |
|---|---|---|
| Chemical Composition | Pure carbon (identical) | Pure carbon |
| Hardness (Mohs) | 10 | 10 |
| Price (1ct G/VS2) | ~£800–£1,500 | ~£4,000–£7,000 |
| Environmental Impact | Significantly lower | High (mining) |
| Certification | IGI, GIA | IGI, GIA, HRD |
| Resale Value | Lower | Moderate |
| Ethical Sourcing | Conflict-free guaranteed | Kimberley Process |
Price Breakdown by Carat
| Carat | Lab-Grown (G/VS2) | Mined (G/VS2) | Savings |
|---|---|---|---|
| 0.50ct | ~£300–£500 | ~£1,200–£2,000 | ~70% |
| 1.00ct | ~£800–£1,500 | ~£4,000–£7,000 | ~75% |
| 2.00ct | ~£2,000–£3,500 | ~£12,000–£20,000 | ~80% |
Frequently Asked Questions
Are lab-grown diamonds real diamonds?
Yes. Lab-grown diamonds are chemically, physically, and optically identical to mined diamonds. The FTC classifies them as real diamonds. They are graded by IGI and GIA using the 4Cs.
Why are lab-grown diamonds cheaper?
They bypass costly mining and supply chains. Using HPHT or CVD technology, production costs are significantly lower — savings passed directly to the consumer.
Do lab-grown diamonds hold their value?
Lab-grown diamonds have lower resale value than mined, but offer far greater value at purchase — you get a significantly larger, higher-quality stone for the same budget.
Can you tell the difference between lab-grown and mined?
Not with the naked eye. Even gemologists require specialist UV or spectroscopic equipment to detect microscopic differences in crystal growth patterns.
Sources
- Gemological Institute of America (GIA) — gia.edu
- International Gemological Institute (IGI) — igi.org
- Federal Trade Commission Jewellery Guides — ftc.gov
Explore our collection: Shop Lab-Grown Diamond Jewellery at Mydharin
