Men's jewellery · Pendant necklace · Pendants
Cobalt Bastion 2.05ct Emerald Lab Diamond Men's Shield Pendant
Cobalt Bastion is a made-to-order men’s shield pendant with a grounded, architectural presence. A 2.05ct electric cobalt blue emerald-cut lab-grown diamond sits caged in platinum channels, framed by brushed 18ct yellow gold and hard black onyx inlay. Suspended from a 5mm flat Cuban-link chain, it feels deliberate, weighty and personal.
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
- Men's jewellery, Pendant necklace, Pendants
- 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
Cobalt Bastion is conceived as a modern talisman: substantial in scale, clean in line and built with a distinctly masculine sense of weight. The 32mm shield-form pendant is crafted in 18ct yellow gold, with a brushed outer border and chamfered edges that give the silhouette a crisp, engineered finish.
At the centre, a 2.05ct fancy vivid electric cobalt blue emerald-cut lab-grown diamond is held in a bold bezel, enclosed by recessed platinum channel walls. The platinum gives the stone a cool architectural frame, while the emerald cut keeps the composition disciplined and direct.
Flush-set onyx inlay panels run along the long sides of the centre stone, creating deep black stripes against the warmth of the gold. The contrast is intentional rather than decorative: dark, graphic and controlled, with the onyx supporting the blue diamond without competing with it.
The pendant suspends from a solid 5mm 18ct yellow-gold flat Cuban-link chain via a riveted platinum bail. As a Studio Product, this is a made-to-order shown configuration; our studio reviews the details before production so proportions, setting tolerances and finishing can be refined for the final piece.
Specifications
- Studio Product made to order in the shown configuration
- Pendant type: men’s shield-form pendant necklace
- Pendant scale: approx 32mm, designed as a substantial talismanic form
- Primary metal: 18ct yellow gold
- Secondary metal: platinum channel walls and riveted bail
- Chain: solid 5mm 18ct yellow-gold flat Cuban link
- Centre stone: 2.05ct emerald cut fancy vivid electric cobalt blue lab-grown diamond
- Centre setting: bold bezel within recessed platinum channel architecture
- Accent material: flush-set black onyx inlay panels, approx 8mm x 4mm each
- Finish: brushed yellow-gold border with chamfered polished edges and clean platinum detailing
- Design language: architectural, geometric and explicitly masculine
- Manufacturing note: no black rhodium or blackened rhodium finish is used
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.
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.
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