UK Lab Grown Diamond Prices, July 2026 Edition (Reconstructed) – Rings.com
Rings.com Research
UK Lab-Grown Diamond Price Index
Monthly benchmark prices for lab-grown diamonds across major UK online retailers. All prices in GBP, inc-VAT.
July 2026 edition · G VS1 Round Excellent IGI · GBP inc-VAT
The same 1.5ct G VS1 IGI round costs £283 at Diamond Labs and £455 at 77 Diamonds, £172 apart for identical specs. At 2ct, that gap reaches £182 on a single stone.
| Retailer | 1ct | 1.5ct | 2ct |
|---|---|---|---|
| Diamond Labs | - | £283 | £389 |
| 77 Diamonds | £302 | £455 | £571 |
| Quality Diamonds | - | £427 | £478 |
| Market Median | - | £427 | £478 |
Total stone price. G VS1 Round Excellent IGI. Median. All prices GBP, inclusive of 20% UK VAT (inc-VAT). Hover any price for sample size (n).
3 retailers. 1,406 listings. G VS1 Round Excellent IGI.
- The same 1.5ct G VS1 IGI round costs £283 at Diamond Labs and £455 at 77 Diamonds, £172 apart for identical specs. At 2ct, that gap reaches £182 on a single stone.
Methodology
Scope. This index tracks listed retail prices (not transaction prices) across major UK online lab-grown diamond retailers. The July 2026 edition covers 1,406 benchmark-matching lab-grown diamond listings across 3 retailers. All prices are in GBP, inclusive of 20% UK VAT (inc-VAT).
Benchmark specification. The benchmark specification is G color, VS1 clarity, round brilliant, Excellent cut, IGI-certified. G color was chosen because it is the highest-volume specification available with consistent depth across the tracked UK retailers. Three weight cells are tracked: 1ct (0.95-1.05ct), 1.5ct (1.45-1.55ct), and 2ct (1.95-2.05ct). Note: the Rings.com US price index uses E color rather than G color. E is a higher color grade and commands a price premium. Cross-market comparisons between the US and UK indices should account for this grade difference.
Statistical method. Each published figure is the median total stone price across all qualifying listings within that cell. Median is used instead of an average to reduce the influence of extreme outlier listings. A minimum of 30 qualifying listings per retailer is required for that retailer's cell to be published, and a Market Median requires at least two qualifying retailers in that cell; a single retailer's price is shown individually but is not published as a market figure. Per-cell sample sizes (n) are visible as tooltips when hovering over any price in the table.
Deduplication. Listings are deduplicated within each retailer by URL. Stones with identical IGI certificate numbers may appear at more than one retailer and are counted as independent listings at each retailer where they appear.
Data sourcing. The UK index is built from live API queries against each retailer's product inventory backend. All three APIs are public-facing endpoints that power the retailers' own consumer-facing search pages. No credentials, scraper accounts, or private API keys were used.
Independence. Rings.com receives no compensation from the retailers included in this index for inclusion or ranking, and no retailer has any editorial control over the methodology or results. This index reflects public list prices only; individual purchase prices may differ due to custom configurations, time-sensitive promotions, or VAT treatment at purchase.