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The Showroom

Meet Lydia at one of our exclusive London locations, available by appointment only.

Visit Us

Meet Lydia in person at one of our London locations by appointment, or book a video call with her.

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Diamonds are available for viewing in:

 

  1. Our Hatton Garden office (within the London Diamond Bourse).

  2. Our Marylebone office (in our exclusive Private Member's Club).

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Ring design sessions are held via Zoom or in-person at our Marylebone location.

 

To request your appointment, complete the form, and we’ll be in touch personally within 48 hours.

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Opening Hours for Appointments

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Appointments are available Monday to Saturday, by request only. ​Check availability by filling out our submission form and our team will be in touch personally.

 

To visit Lydia, you must book your complimentary appointment ahead of time.

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Hatton Garden Address

 

​Private office at The London Diamond Bourse, 100 Hatton Garden, EC1N 8NX.
See on Map.

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7 min walk from Chancery Lane Station.

10 min walk from Farringdon Station.

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Marylebone Address​

 

Private members' club location at 44 Great Cumberland Place, W1H 7BS. 
See on Map.

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4 min walk from Marble Arch Station.

12 min walk from Bond Street Station.

15 min walk from Marylebone Station.

Address anchor

Ethical Engagement Rings, Handmade in London.

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Our bespoke engagement rings are hand crafted and hand finished inside our own workshops. We use only premium materials.

 

We support our clients in creating intimate, meaningful proposals over performative gestures.​​

© 2025 Lydia McCarthy-Keen Limited.

Monday - Thursday - 11.00am - 7.30pm

Friday - 11am - 6.00pm

Saturday - 9.30am - 1.00pm

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Tel: +44(0) 208 468 7173

WhatsApp: +44(0) 7395 357 803

Email: lydia@lmkeen.com

Office: concierge@lmkeen.com

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