Lab-grown, made in their own workshop · Hatton Garden

Kings Of Diamonds

Ranked #44 of 311 verified London jewellers on review evidence: 310 analysed Google reviews, 307 of them five star, from a shop at 31 Hatton Garden whose rings are handmade to order in its own London workshop.

★★★★★ 5 324 Google reviews, checked September 2026

Hatton Garden London

Appointment advised How you get through the door

#44 Top 100 rank, #44 of 311 verified on review evidence

Location Hatton Garden, London

Appointments Appointment advised

Opening hours Mon to Fri 10am to 6pm, Sat 11am to 4pm

Speciality Lab-grown diamond engagement rings, handmade to order

31 Hatton Garden, EC1N 8DH · View on Google Maps · Visit website

Our verdict

Ranked #44 of 311 on 310 analysed reviews, 307 of them five star. Lab-grown rings handmade to order with lifetime terms most of the quarter does not match. Book the appointment.

Aftercare and resizing ×28Bespoke and design process ×26Depth of knowledge ×15Ring exceeded expectations ×12Patient with questions ×11Kept informed throughout ×11

About

Made to Order, Backed for Life

Kings Of Diamonds lead with lab-grown diamonds, and every ring is handmade to order in their own London workshop rather than assembled from stock settings. The shop is at 31 Hatton Garden, with Lee, Zaid and Shaheed the names that come up repeatedly in the reviews.

Google shows 324 reviews. We analysed 310: 307 are five star, one is four star and two sit at two stars, across more than eight years, with 68 from the past twelve months. They reply to 35 per cent of reviews.

The standing terms are stronger than most at this rank: a lifetime warranty, free resizing, free engraving and free polishing, with worldwide express shipping for remote buyers. The workshop films on their Instagram and TikTok show the making rather than just the finished pieces.

Handmade to order with a lifetime warranty behind it, and 307 of 310 analysed reviews at five star.

London Engagement Rings

Where they stand

#44 of 311 Verified London Jewellers

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. Kings Of Diamonds ranks #44 of 311.

They also appear on two of our ranked lists: Open Late and Lab-Grown Specialists.

What reviewers say

310Reviews analysed

307Five star

9Years of reviews

Aftercare and resizing lead the themes with 28 mentions, which fits a shop giving both away free for life, with 26 describing the bespoke and design process and 15 depth of knowledge. Twelve reviewers say the ring exceeded expectations and nine mention a quick turnaround.

Two reviews sit at two stars against 307 at five, and just over a third of reviews carry a reply, so there is a visible record of how the shop responds.

For scale: that record sits in the top 15 per cent of the 311 for review volume. In plain terms, you should be in safe hands here.

Lee couldn't have been more helpful, from my first initial enquiry through Instagram and the following phone call he listened to my requirements and specified the perfect diamond for the style of engagement ring I was after, all within my stated budget. Finance options were explained and I was easily able to spread the cost of the ring over 12 months at 0%.”

Alex Bloomfield · March 2021 · On Google

A brilliant experience with King's of Diamonds today. My wife asked if a small resize of a 4 x diamond eternity ring, made by Kings last year was possible. And my daughter had lost a small diamond from a wedding band, also made by them recently.”

Peter Townshend · June 2026 · On Google

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

Who this suits

The Right Buyer for Kings Of Diamonds

This suits a lab-grown buyer who wants the ring made rather than picked, with the aftercare locked in: lifetime warranty, free resizing and free polishing remove the running costs that surprise people years later.

It also suits a buyer who wants to see the workmanship before committing; the workshop content on their social channels is the real thing. Appointments are advised at busy times.

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For the jeweller

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Common questions

Kings Of Diamonds: Frequently Asked Questions

Do I need an appointment at Kings Of Diamonds?

Appointments are advised, booked through their site. The shop is at 31 Hatton Garden.

What are Kings Of Diamonds’ opening hours?

Monday to Friday 10am to 6pm and Saturday 11am to 4pm.

What does the lifetime warranty cover?

A lifetime ring warranty with free resizing, free engraving and free polishing, which takes the long-term running costs out of the ring.

Why are they ranked #44 of 311?

The ranking is built on Google review evidence across every London jeweller we could verify as a genuine engagement ring business. Their record is 310 analysed reviews, 307 of them five star, with 68 from the past twelve months.