Cocktail ring · Luxury jewellery · Rings
Cerulean Princess Architectural Cocktail Ring in Platinum, Rose Gold, Moonstone & Spinel
A dramatic studio-approved cocktail ring, this architectural design centres a princess-cut cerulean-blue lab-grown diamond within a squared platinum crown. Rose gold saddle-set moonstone cabochons and vivid red spinel accents heighten the interplay of geometry and colour, while the structured, dual-finish band brings a refined, sculptural presence to the hand. Made to order; our studio reviews every detail before production.
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, Luxury jewellery, Rings
- 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
A bold exploration of form and colour, this made-to-order cocktail ring features a princess-cut lab-grown diamond in a deep cerulean hue, elevated within a squared architectural crown of micro-tapered platinum blades. Four sharply rising platinum towers are each inset with a vivid red spinel bead, introducing a striking contrast. Flanking the centre stone, two translucent blue-white moonstone cabochons are set in rose gold saddle mounts, their adularescent shimmer softening the ring's angular geometry. The structured band tapers from a 4mm shoulder to a 2mm comfort-fit shank, with alternating polished platinum and brushed rose gold half-round rails encircling the finger. This design balances dramatic presence with considered detail, inviting admiration from every angle.
Specifications
- Primary metal: Platinum, polished finish
- Secondary metal: Rose gold, brushed and polished accents
- Main stone: Princess-cut lab-grown diamond, fancy vivid deep cerulean-blue with indigo undertone
- Accent stones: Four vivid red spinel beads, one at each crown corner
- Additional stones: Two cabochon moonstones, translucent blue-white with adularescent shimmer, set in rose gold saddle mounts
- Structured band: 4mm shoulder tapering to 2mm comfort-fit shank, alternating platinum and rose gold rails
- Architectural, geometric design with sculptural presence
- Additional stone: Side feature stone Moonstone
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.
The story of this design
We designed this ring for the person who understands that structure is its own kind of beauty. The princess cut sits at the heart of everything here — its clean geometry demanding a setting that could meet it as an equal, which is why we turned to platinum's cool discipline and let rose gold trace the warmer architectural lines beneath. The spinel accents were chosen not for decoration but for tension, their depth pulling against the stone's brightness in the way shadow defines a building's form. This is a piece made for evenings when you wish to say something without speaking — a ring that carries a certain quiet authority, worn by someone who considers every line deliberate.
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 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.
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