Promise Diamond Platinum Eternity Ring

Jewellery certificate | To reassure you and your partner that this ring has been made with care, using responsibly sourced materials and local craftspeople

One free resize within the first year | For UK customers. To discuss resizing of international orders, please get in touch

Keepsake ring box | Biodegradable packaging (except foam insert)

Free UK delivery | Tracked and insured

Our Ready to Wear engagement rings and unique editions are deliverable in as few as three working days. 

Our Made to Order items are delivered approximately in eight weeks from the order date.

Please contact us if you are in a hurry.

Ready-to-wear jewellery
Ready-to-wear engagement rings and unique editions may be returned for a full refund within 30 days, provided they’re in original condition and packaging and unworn condition.

Made-to-order pieces
Bespoke commissions, wedding bands and collection engagement rings are non-refundable and non-exchangeable, as they’re made to order. If an item is faulty, however, we will repair or remake it where possible.

Return timeframes

• Full-price items: return within 30 days
  
• Discounted items: return within 14 days
  

How to return
Email us to request a Return Authorisation Number (RAN) before sending your item via a tracked and insured service like Royal Mail Special Delivery. Please include your RAN, along with proof of purchase, in your parcel.

Postage

• UK returns: free (we’ll refund your postage with proof of receipt)
  
• International returns: postage is the customer’s responsibility and non-refundable
  

Condition
All items must be returned in their original condition and packaging.

Whether you're measuring your own ring size or trying to guess your partner's, ring sizing isn't always easy to get right. Click here to order a ring sizer loan.

If you can't find your size in the drop-down menu, please email with your requested size and we'll send you a quote.

How long will my order take?
Most made-to-order rings are delivered in around 8 weeks from order the order date. Ready-to-wear editions are delivered in roughly 3-5 working days. If you need to receive your order sooner, please get in touch and we’ll confirm if we can meet your deadline.

Can I receive a ring faster than 8 weeks?
Sometimes, depending on design complexity and our workload. If you're in a real hurry, your options include a sample ring loan or a ready-to-wear ring (3–5 days delivery).

What if I don’t know the ring size?
We can help - please see our sizing guides or contact us for discreet options.

Can you make custom sizes?
Yes. Smaller sizes are priced the same as the minimum listed; larger sizes may cost more. Please contact us to arrange.

Can I visit a showroom?
We're available by appointment at the London Diamond Bourse in London's Hatton Garden. Please book your consultation in advance.

How do I know materials are ethical?
We're committed to changing the world one gram of gold at a time, using our jewellery as an active vessel for good. This means working exclusively with recycled materials that are minimal in environmental impact or artisanally mined materials that proactively support mining communities. Every made-to-order piece comes with a certificate detailing material provenance and UK-based production.

Where is your jewellery made?
Entirely in the UK - cast in the Midlands, then set, finished and hallmarked in London's Hatton Garden.

Do you offer different finishes?
Yes - many of our designs can take on a matte and/or hammered finish. Please share your preference by adding a note at checkout or sending us an email.

What’s the difference between 9ct and 18ct gold?
9ct gold is slightly softer and paler in colour. We recommend 18ct for durability, with 14ct as a mid-range option. Learn more.

Will I be allergic to your jewellery?
Allergic reactions are rare. Our white gold uses palladium alloys, which are low-allergenic.

Is your jewellery vegan?
Mostly, aside from our sustainably harvested Tahitian pearls. Some traditional tools and materials (e.g. beeswax, leather) may also be used in workshops. Learn more.

How does your bespoke service work?
Please contact us to share your idea, budget and ideal timeline. We’ll create some initial designs for free (welcoming up to two free revisions). A £300 fee would apply if you weren't to proceed after this point. Production takes roughly 10–12 weeks. We request a 50% upfront payment to begin production, and the balance on completion. Learn more.

Can you remodel heirloom jewellery?
Yes - we specialise in remodelling existing pieces into new designs.

Have another question?
Please get in touch - we usually reply within one-two working days.