Cullen Jewellery

Second Floor, 89 Great Eastern Street, EC2A 3HX · View on Google Maps · Visit website

Cullen Jewellery is a lab-grown diamond specialist working from a second-floor showroom at 89 Great Eastern Street in Shoreditch, and the newest arrival at the top of our ranking. Their full Google listing name is Cullen Jewellery Lab Grown Diamond Engagement Rings London, and the listing does what it says: lab-grown diamonds, coloured sapphires and moissanite, with no natural diamond category at all.

The London review record is one year old, and it is perfect. Google shows 657 reviews; we analysed 570 of them and every single one is five star. They reply to 98 per cent of reviews.

Because the record is young, it should be read as a first year rather than a decade. But the volume and consistency of that first year are why they rank #4 of 311, and the themes below suggest the score is earned in the room rather than collected at the till.

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. Cullen Jewellery ranks #4 of 311.

They also hold No. 1 on our Beyond Hatton Garden list, No. 2 on our Open Late list, No. 2 on our Lab-Grown Specialists list, No. 3 on our First-Time Buyers list, No. 3 on our Highest Rated list, No. 4 on our No-Pressure list, and No. 18 on our Most Reviewed list.

One theme dominates: 147 reviewers mention depth of knowledge, which is 28 per cent of everything we analysed, and 64 more describe being given unhurried time with their questions. Thirty-four specifically mention no pressure to buy.

Because the showroom is new, the aftercare themes are thin so far, with seven mentions of resizing or servicing and seven of first-timers being guided through. That is what a one-year record looks like, and it will fill in either direction from here. We recount monthly.

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

This suits a buyer who has already decided on lab-grown. There is no natural stock to be steered toward or away from, so the conversation is entirely about the stone and the setting, and 28 per cent of reviewers single out how well that conversation is handled.

It also suits buyers who cannot get to EC1 in working hours: the showroom runs to 7pm on Thursdays and Fridays and opens at 8am on Saturdays, and it sits in Shoreditch rather than the Hatton Garden crush. Appointment only, so book before you go.

A buyer set on a natural diamond should look elsewhere, because they do not sell them.

Does Cullen Jewellery sell natural diamonds?

No. The catalogue is lab-grown diamonds, coloured sapphires and moissanite, with no natural diamond category. If you want a mined stone, this is not the shop.

Do I need an appointment?

Yes, the showroom is appointment only. It sits on the second floor of 89 Great Eastern Street in Shoreditch, so there is no window to walk past.

What are Cullen Jewellery's opening hours?

Tuesday 9am to 5pm, Wednesday 9am to 6pm, Thursday and Friday 9am to 7pm, and Saturday 8am to 4pm. Closed Sunday and Monday.

Why are they ranked #4 of 311 with only a year of reviews?

The ranking is built on Google review evidence. Their first London year produced 570 analysed reviews, every one of them five star, with replies to 98 per cent. We note the record's youth on this page and recount it monthly.