The Best Lab-Grown Diamond
Jewellers in London
Lab-grown diamonds cost a fraction of a mined stone of the same size and grade, and most of London’s trade now sells both. We checked each jeweller’s own website rather than guessing from a business name, and these seven are the highest rated of those confirmed to offer lab-grown.
63 verified jewellers are confirmed to sell lab-grown diamonds, each checked against the jeweller’s own website. Ranked on the same Wilson score used for the Top 100, which weighs the proportion of positive reviews against how many stand behind it. Full method.
The Diamond Ring Company
5.0 from 1,198 Google reviews · Hatton Garden · Appointment advised · Natural and lab-grown
Cullen Jewellery Lab Grown Diamond Engagement Rings London
5.0 from 566 Google reviews · Shoreditch · Appointment only · Lab-grown
DIAMOUR JEWELLERS
5.0 from 471 Google reviews · Hatton Garden · Natural and lab-grown
Flawless Fine Jewellery
5.0 from 2,179 Google reviews · Hatton Garden · Appointment advised · Natural and lab-grown
London Diamonds
5.0 from 995 Google reviews · Hatton Garden · Appointment only · Natural and lab-grown
Layla Diamonds
5.0 from 339 Google reviews · Hatton Garden · Appointment only · Lab-grown
5.0 from 1,385 Google reviews · Hatton Garden · Walk-in welcome · Natural and lab-grown
Gemima
Gemima is not in the ranking above, and cannot be: she has no Google Business Profile, so there is no review record to rank. She is here on judgement rather than data, which is why she sits apart from the seven.
The case for her is qualification. Gemima Macdonald is a GIA-qualified gemologist with a decade in the trade including time at Boodles, working appointment-only from a Hatton Garden workshop. She sources off-market, favours unconventional cuts, and runs a “Diamond & Design” appointment where you see stones side by side before committing. Commissions typically start around £5,000 over four to six weeks. Full profile.
Review figures from Google, July 2026, refreshed monthly.
Other Ways to Narrow It Down
Walk-in Jewellers
The best rated London jewellers whose own Google listing says walk-ins are welcome.
Read the list → Mined stonesNatural Diamond Houses
Jewellers who deal exclusively in natural mined diamonds, confirmed on their own websites.
Read the list → Never below four starsSpotless Records
Jewellers who have never received a Google review below four stars, ranked by how much evidence stands behind that record.
Read the list →