Bespoke Diamond Jewellery — Made for One Person
Engagement rings, diamond pendants and earrings — designed with you, set with certified diamonds, made to your budget. David guides the whole process, no obligation to start.
New to Bespoke Diamond Jewellery? Here’s Exactly How It Works.
David guides you through the entire design process — from first idea to finished piece. Plain language, no obligation, no guesswork.
Call David
Call David — or WhatsApp. Share your idea, your budget, or even just a picture. He takes it from there.
Design Consultation
David walks you through options in plain language. No jargon, no pressure. Just honest advice on what’s possible and what makes sense.
View & Choose
See physical certified stones in person at our Johannesburg offices, or arrange a meeting in Cape Town. Choose your diamond with full confidence, not from catalogue photos alone.
Photos at Every Stage
Once design is finalised, we send you progress photos throughout the making process. You approve before we proceed at each step.
Door-to-Door Delivery
Fully insured courier anywhere in South Africa. Your bespoke piece arrives safely, wherever you are in the country.
“Anywhere in South Africa. Real diamonds. Real people. Real simple.”
Have something in mind?
Describe the made-to-order diamond piece you have in mind and David will talk you through what is possible, with a clear quote and timeline.
The piece you can't find in a shop.
Some diamond pieces simply do not exist on a retail shelf — a pendant in memory of someone, earrings to mark a milestone, or a ring designed around a certified stone. Bespoke is how those pieces come to be.
Diagem designs and manufactures made-to-order diamond jewellery, set with the same certified diamonds we trade. Because the diamonds come direct and the work is done without a retail mark-up, a bespoke piece often costs less than a comparable ready-made one — while being entirely your own.
Many commissions begin with a specific diamond, occasion or design idea. Bring the idea, diamond brief or reference style, and David will guide the design.
A few of the things we make.
New commissions
Pendants, earrings, bracelets and dress rings designed from scratch around a certified diamond.
Made-to-order pieces
Diamond jewellery designed around a certified stone, personal brief and clear budget.
Matching sets
Coordinated pieces — ring, pendant and earrings — designed to be worn together.
Start with the diamond.
Every bespoke piece begins with the stone. Explore certified natural or lab-grown diamonds, or if it's a ring you're after, see our bespoke engagement rings. The diamond guide will help you understand quality before you commission.
Custom ring design in South Africa.
If your enquiry is a bespoke diamond ring, Diagem starts with a certified stone and designs the ring around it. David can discuss solitaire, halo, oval, three-stone and other engagement ring styles, then guide the metal, setting and proportions before the piece is made.
Appointments are handled from Johannesburg, with Cape Town appointments by arrangement and insured delivery nationwide. This page now supports custom ring design South Africa, bespoke diamond ring, bespoke ring designer and ring design consultation enquiries without sending ring buyers to a generic jewellery answer.
With over 25 years in the South African diamond trade, we leave no stone unturned to find exactly what you're looking for. Every enquiry is handled personally by David — no chatbots, no automated responses. Real expertise. Real service.
📞 Call DavidLet’s talk →
In-house workshop
Made at our bench, not bought in.
Diagem designs and manufactures made-to-order diamond jewellery, rather than reselling generic stock. Your piece is designed and made to order around a certified diamond — from the first CAD render to the finished setting — so you deal directly with the people who build it.
From stone to setting
We start with the certified diamond and build the ring around it: a 3D CAD render for you to approve before we make anything, then hand-finishing at the bench.
Made in Johannesburg
Design and manufacturing happen in-house in Johannesburg, with Cape Town consultations by arrangement and insured delivery nationwide.
Frequently asked questions
What kinds of diamond jewellery can you make?
Do you repair or resize jewellery?
How long does a bespoke piece take?
Do you work to a set budget?
Let's find your diamond.
Speak to a dealer, not a salesperson. Get an honest quote with no obligation.