Cocktail ring · Rings · Women's jewellery
Lagoon Fin 2.18ct Trillion Diamond Cocktail Ring in Platinum and Yellow Gold
A sculptural platinum cocktail ring centred on a 2.18ct fancy vivid lagoon green trillion lab-grown diamond, held in a poised three-fin cradle. Yellow-gold inner channels carry graduating tsavorite accents through the shoulders, while tiny hidden white diamonds beneath the gallery bring a private flicker as the ring moves.
Available to order — price on enquiry
Answer a few questions and our studio will prepare a tailored quote based on your preferred metal, stones, size and budget.
Made to order. Each piece begins when you do — typically 4 to 6 weeks from confirmation. Stone availability is confirmed by the studio before any work begins.
- Approved by you before we craft it — we share a design first
- Lifetime aftercare & resizing at our Hatton Garden atelier
- Worldwide delivery, fully insured and tracked
- Handcrafted in Hatton Garden by the London Gold Centre studio
Details
- Category
- Cocktail ring, Rings, Women's jewellery
- Lead time
- 4 to 6 weeks
- Made to order
- Yes — handcrafted in our atelier
How this works
You stay in control. Before manufacturing begins.
Once your order is placed, we don't go straight into manufacturing. The atelier first prepares everything you need to be sure — and nothing is made until you approve it.
A full CAD design
A precise 3D render showing the exact piece we will make for you.
The complete specifications
Stones, metals, sizes, settings and finish — set out clearly so nothing is left to interpretation.
Photographs of the actual stones
And, where useful, short videos — so you see the exact stones we will set, not stock images.
Manufacturing only begins after you have reviewed all of this and confirmed you are happy. Your piece is made on your approval, not before.
Worldwide delivery
Crafted in London. Sent wherever you are.
We work from our atelier in Hatton Garden — but the stones, the metals, the inspiration and the craftsmanship behind each piece can come together from all over the world. In a way, the piece you wear carries a little of the world with it.
Secure, insured delivery
Every order is sent fully insured by carriers we trust, with tracking from the moment your piece leaves the atelier — so you know exactly where it is, every step of the way.
A note on local taxes
For deliveries outside the UK, import duty, customs charges or local VAT may apply at the destination. These are set by the country you're in and are the customer's responsibility — but we'll happily guide you through what to expect, and our delivery partner will help with the formalities so nothing comes as a surprise.
About this piece
The Lagoon Fin ring is designed as a made to order Studio Product with a distinct collector’s character: bold enough for evening, yet refined in its proportions and finish. Its 2.18ct fancy vivid lagoon green trillion lab-grown diamond sits in a high-shouldered platinum frame, secured by a tension-inspired three-fin cradle that gives the stone air, angle and presence without relying on a conventional prong setting.
Yellow-gold inner channels introduce warmth through the shoulders, each carrying graduating baguette-style tsavorite accents that echo the green of the centre stone while remaining deliberately secondary. Beneath the gallery, a pierced construction reveals tiny icy white round diamonds, bright-cut under the lip so their brilliance appears only in motion or from side angles.
The shown configuration is polished platinum with yellow-gold detailing, tsavorite shoulders and concealed VS white diamond detail. As with all made to order BespokeForever Studio Products, our studio reviews the details before production, including stone matching, setting engineering, finger size and final proportions.
Specifications
- Studio Product, made to order
- Product type: women’s cocktail ring
- Primary metal: platinum
- Secondary metal: yellow gold detailing
- Finish: polished
- Centre stone: 2.18ct trillion fancy vivid lagoon green lab-grown diamond
- Accent stones: 0.90ct total tsavorite in graduating baguette-style cuts along the shoulders
- Hidden detail stones: 0.08ct total round icy white VS diamonds beneath the gallery lip
- Setting concept: tension-inspired three-fin cradle with high sculptural shoulders
- Gallery: pierced under-gallery with concealed bright-cut diamond detail
- Design mood: bold, sculptural and evening-led
- Shown configuration subject to studio review before production
- Additional stone: Hidden detail stone Diamond — 0.08ct total
This is a made-to-order Studio Product, available on backorder. Estimated manufacturing time is 4 to 6 weeks from order. The price and image shown reflect the shown configuration; our studio reviews the metal, stone availability and making details before production.
Metals & stones in this piece
Platinum is a prestigious and naturally white metal, prized for its rarity, density, and enduring lustre. Unlike other precious metals, it does not tarnish or discolour with time, maintaining its cool, luminous sheen. Its remarkable durability—resistant to wear and corrosion—makes it an ideal choice for daily wear, though its softness relative to hardness means it develops a gentle patina over years of use, a characteristic many cherish as a sign of authenticity and lived-in elegance. Lab-grown diamonds, chemically and optically identical to mined diamonds, offer exceptional brilliance and hardness (10 on the Mohs scale), ensuring they resist scratching and retain their fire for generations. A polished finish on platinum enhances its reflective quality, though this surface may soften subtly with wear, adding to the piece’s unique character rather than detracting from it.
Caring for this piece
To preserve your platinum and lab-grown diamond jewellery, clean it regularly with a soft-bristled brush and warm, soapy water, then rinse and pat dry with a lint-free cloth. Store pieces separately in a fabric-lined box or pouch to prevent scratches from other jewellery. Avoid exposing platinum to harsh chemicals, such as chlorine or bleach, which can weaken the metal over time, and remove your jewellery before swimming, gardening, or engaging in physical activities that may subject it to knocks or abrasions. While platinum is highly durable, its polished surface may develop a natural patina; if you prefer a high-shine finish, a jeweller can repolish it for you. Handle your pieces with care to maintain their beauty for years to come.
Made yours
Customise this design.
Try the piece in different metals or stones, then request a personalised quote when you find the version you would wear. The studio shapes the variation with you.
Made to order
Nothing is made before it is yours.
Every piece begins when you do. We confirm every detail — including stone availability — before a single setting is touched. In the rare case a stone cannot be sourced, we will contact you straight away and offer an honest alternative or a full refund.
From here
Four quiet steps to your piece.
Discover
You have found a piece you love — or one to begin from.
Refine
Adjust the metal, the stone, the proportions — together with our studio.
Approve
We confirm every detail, including stone availability, before any work begins.
Craft
Each piece is handcrafted to order. Typically 4 to 6 weeks.
Questions about this design
Real answers from the studio.
No questions about this piece yet — be the first to ask.
Discover more
