London Diamonds

24 Greville Street, EC1N 8SS · View on Google Maps · Visit website

London Diamonds work by appointment from 24 Greville Street, on the edge of the Hatton Garden quarter, and rank #7 of the 311 London jewellers we verified. Google shows 999 reviews: 995 five star, and four below, all of the critical ones dating from 2020 and 2021.

They sell both natural and lab-grown, and say themselves that the business was originally built on mined diamonds before lab-grown joined the range. The reviews describe a process run as much in messages as in meetings, with reviewers repeatedly mentioning enquiries handled over WhatsApp and Instagram from first contact through to design sign-off.

They reply to 71 per cent of reviews. One thing to weigh: the record was built mostly in earlier years, with 23 reviews arriving in the past twelve months, so read it as an established book of work rather than a current sprint.

Our Top 100 ranks every London business we could verify as a genuine engagement ring jeweller, 311 of them from a pool of 1,120 candidates, on the strength of their Google review evidence. London Diamonds rank #7 of 311.

They also hold No. 5 on our First-Time Buyers list, No. 5 on our Lab-Grown Specialists list, No. 7 on our Most Reviewed list, and No. 7 on our No-Pressure list.

The theme profile is unusual: aftercare and resizing leads with 74 mentions, ahead of the ring itself. Seventy-one reviewers report that the partner loves the ring, 69 describe the bespoke and design process, and 53 mention being kept informed throughout, which fits a business run over messaging.

Fifty-two mention depth of knowledge and 46 the absence of sales pressure. The four sub-five-star reviews are isolated rather than a pattern: one workmanship complaint and one pricing complaint, both from 2020 to 2021, both with owner replies attached.

Review figures taken from Google and checked in July 2026. We recount them monthly.

This suits a buyer who wants a bespoke commission managed remotely, with the showroom visit as a milestone rather than the whole process. The communication and aftercare themes are the strongest parts of the record.

It will suit walk-in browsers less well: appointment only, weekdays only, from premises on Greville Street rather than the main Hatton Garden run.

Can I walk into London Diamonds?

No, they work by appointment only, Monday to Friday 10am to 5.30pm, from 24 Greville Street. Reviewers describe most of the process being handled over WhatsApp and Instagram between visits.

Do they sell lab-grown diamonds?

Yes, both. The business was originally built on mined diamonds and now offers lab-grown alongside natural.

What is their review record like?

Google shows 999 reviews: 995 five star and four below, with the critical ones dating from 2020 and 2021. They reply to 71 per cent of reviews.

Why are they ranked #7 of 311?

The ranking is built on Google review evidence across every London jeweller we could verify as a genuine engagement ring business. A 999-review record at 99.6 per cent positive puts them seventh.