The UK’s first B Corp jeweller · Clerkenwell

EC One

The UK’s first B Corp jeweller, handmaking on site at 41 Exmouth Market since 1997, ranked #66 of 305 verified London jewellers on 103 analysed Google reviews.

★★★★★ 5 105 Google reviews, checked September 2026
Clerkenwell London
Walk-in welcome How you get through the door
#66 Top 100 rank, #66 of 305 verified on review evidence
Location Clerkenwell, London
Appointments Walk-in welcome
Opening hours Mon to Fri 10am to 6pm, Sat 10.30am to 6pm
Speciality Ethical engagement rings, on-site workshop, guest designers

41 Exmouth Market, EC1R 4QL

Find them on Google Maps →

Our verdict

Ranked #66 of 305 on 103 analysed reviews across twelve years. The UK’s first B Corp jeweller, handmaking on site since 1997, with guest designers worth the browse alone.

Bespoke and design process ×14Depth of knowledge ×9Patient with questions ×5

About

Handmaking on Exmouth Market Since 1997

EC One have handmade jewellery in their on-site Clerkenwell workshop since 1997, and the shop wears its ethics as the headline: it is the UK’s first B Corp certified jeweller, with its metals, diamonds and gemstones sourcing set out openly on the site. Alongside the house work, a changing roster of guest designers gives the cases more range than a single-studio shop.

Google shows 105 reviews. We analysed 103: 101 are five star and two are four star, with nothing below that, across more than twelve years. Seven arrived in the past twelve months, and just over half of all reviews carry a reply.

Engagement work runs from the collection through full bespoke, with remodelling and repairs handled in the same workshop. It is a walk-in shop six days a week, two doors from the Exmouth Market restaurants.

The UK’s first B Corp jeweller, with the workshop behind the shop since 1997.

London Engagement Rings
Where they stand

#66 of 305 Verified London Jewellers

Our Top 100 ranks every London business we could verify as a genuine engagement ring jeweller, 305 of them from a pool of 1,120 candidates, on the strength of their Google review evidence. EC One ranks #66 of 305.

They also appear on five of our ranked lists: Walk-In Friendly, Outside Hatton Garden, Highest Rated, Open Late and Lab-Grown Specialists.

What reviewers say
103Reviews analysed
101Five star
12Years of reviews

The bespoke and design process leads the themes with 14 mentions, with nine citing depth of knowledge and five patience with questions, across a record that spans twelve years without a review below four stars.

The pace is steady rather than fast, which fits a neighbourhood shop that has been on the same street for nearly three decades.

For scale: that record sits in the top 1 per cent for the share of reviews at four stars or better. In plain terms, you should be in safe hands here.

Jo and the team at EC One made a beautiful bespoke engagement ring for myself and my partner. The engagement proposal was due to be something of a surprise, though I had been given a good idea of what my partner wanted!”
Tom W · March 2020 · On Google
I couldn't recommend EC One more to anyone looking for a beautiful bespoke engagement ring. It can be a very daunting process choosing a jeweller, finding a diamond and designing the ring, but Jo and the team were absolutely fantastic and made me feel in safe hands throughout the whole process.”
Harry Leonard · December 2023 · On Google

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

Who this suits

The Right Buyer for EC One

This suits a buyer for whom the sourcing genuinely matters: the B Corp certification is audited, not a slogan, and the ethos pages set out where metals and stones come from. The guest designer cases also make it a good browse for someone still working out their taste.

Remodelling family gold is home ground, with the workshop on site. Exmouth Market makes the visit a pleasure, and McCaul Goldsmiths across the street means one trip covers two of the most distinctive studios we rank.

For the jeweller

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Common questions

EC One: Frequently Asked Questions

Do I need an appointment at EC One?

No. The Exmouth Market shop is walk-in six days a week, with bespoke and remodelling consultations bookable through the site.

What are EC One’s opening hours?

Monday to Friday 10am to 6pm and Saturday 10.30am to 6pm.

What does B Corp mean for a jeweller?

B Corp certification audits a business’s social and environmental practice as a whole. EC One was the first UK jeweller to achieve it, and the site sets out the metals, diamond and gemstone sourcing behind it.

Why are they ranked #66 of 305?

The ranking is built on Google review evidence across every London jeweller we could verify as a genuine engagement ring business. Their record is 103 analysed reviews across more than twelve years, nothing below four stars.

The evidence behind this guide

This is the only place online that ranks London's engagement ring jewellers on review evidence. I screened 1,120 London businesses, verified 305 as genuine engagement ring jewellers, and re-crawl their Google reviews every month, 57,304 reviews at the last count. Every listing is checked for district, walk-in access, natural or lab-grown stones and opening hours before it appears. The method is published in full on the Top 100, and rankings cannot be bought: editorial policy.