“Absolutely exceptional service. From first contact till delivery David went above and beyond to assist in creating something beautiful. Really recommend!”
Bespoke engagement rings
Bespoke Diamond Engagement Rings in South Africa
Choose the diamond first. Diagem helps clients create bespoke diamond engagement rings in South Africa around a certified natural GIA diamond or IGI lab-grown diamond, with personal guidance from David.
Johannesburg engagement ring appointment
Choose the diamond first, then design the ring around it.
For engagement ring enquiries in Johannesburg and South Africa, David helps you compare the centre diamond before the setting is finalised. Start with the certificate, shape, size and budget range, then build the bespoke ring around that specific diamond.
Natural diamonds are GIA certified. Lab-grown diamonds are IGI certified. Both routes can be used for a real diamond engagement ring, depending on the buyer’s priorities.
Buying guide
How to Choose a Diamond Engagement Ring in South Africa
Start with the centre diamond, not the setting. A good diamond engagement ring begins with your budget range, a certified natural or lab-grown diamond, and a design built around that specific stone.
1. Set your budget range
Your total budget is split between the centre diamond and the setting. David can explain the trade-offs between size, cut, certificate, colour, clarity and design.
2. Choose natural or lab-grown
Both natural and lab-grown options are real diamonds. Natural diamonds are GIA certified; lab-grown diamonds are IGI certified, with different value and size economics.
3. Compare the certificate
The certificate helps you compare the diamond properly instead of relying only on carat size or catalogue photos.
4. Pick the shape first
Round, oval, cushion, pear and emerald cuts each change how the finished engagement ring looks on the hand.
5. Match the setting to lifestyle
The ring should suit how it will be worn every day, from a clean solitaire to a more detailed halo or three-stone design.
6. View, design, then make
Diamond viewings are arranged in Johannesburg. Cape Town appointments may be arranged with David by prior arrangement.
1. Choose your diamond
Start with the diamond you love. We'll take care of the rest.
Natural Diamonds
GIA Certified
Earth-formed, rare and timeless. A natural diamond is a symbol of lasting love.
Explore natural diamonds →
Lab-Grown Diamonds
IGI Certified
Real diamonds with the same beauty and brilliance, offering different size and value economics.
Explore lab-grown diamonds →
2. Tell David about her
Share her style,
we'll bring it to life.
Send David ideas, photos or questions. You don't need to know exactly what the finished ring should look like.
Show us a ring she loves, an inspiration photo or simply tell David what you know about her style.
Chat with David
3. Your ring. Designed around your diamond.
From your idea to a one-of-a-kind ring.
1
Sketch
Your ideas become a clear design direction.
2
CAD Design
Where appropriate, see the design in 3D before manufacture.
3
Refinement
Review the details and design direction before manufacture.
4
Finished Ring
The approved design becomes a ring made around your diamond.
Not sure what to budget?
We'll help you decide.
Your total budget is shared between the centre diamond and the setting. Tell David what you're comfortable spending and he can explain the trade-offs between diamond size, quality and design.
Get advice from DavidWhy choose Diagem
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Diamond first approachThe right ring starts with the right diamond.
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GIA & IGI certifiedGIA natural and IGI lab-grown options.
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Bespoke designYour ring is developed around the diamond you choose.
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Personal guidanceDavid is with you from first enquiry to next step.
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Trusted & discreetA private, personal buying experience.
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Diamond Dealers Club of South AfricaFull member of the DDCSA — South Africa's leading body regulating diamond dealers. Membership requires proven ethical standing.
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World Federation of Diamond BoursesMember of the WFDB — the global authority representing diamond bourses and dealers in over 30 countries worldwide.
Learn more →We don't just say we're trustworthy — we're certified by the organisations that define what trust means in the diamond industry.
Verified Google reviews
Latest Google reviews
“I had a fantastic experience buying an engagement ring for Ashton. I had zero experience with diamonds, but he guided me patiently, honestly, and never pushy. He helped me find exactly the right ring in a short time, and the price was very fair. Highly recommend!”
“I am absolutely blown away by the experience of dealing with David - he is so knowledgeable, professional, and really went out of his way to find me the perfect stone... and gosh, it is the most beautiful gem i have ever laid my eyes on!! Thank you David”
Reviews sourced from Diagem Diamonds’ verified Google Business Profile. View Diagem reviews on Google
Questions
Engagement ring questions
Quick answers before you message David.
Do I choose the diamond or the ring design first?
At Diagem, the centre diamond comes first. David helps you choose a natural GIA-certified or lab-grown IGI-certified diamond, then the ring design is developed around that diamond and the style you have in mind.
Can Diagem help if I do not know what style she wants?
Yes. You can send David inspiration photos, a ring she likes, a budget range, or a simple description of her style. Diagem helps translate that into a practical engagement-ring direction.
Do you make engagement rings for online checkout?
No. Diagem is a diamond dealer first, not an online jewellery checkout. Engagement rings are handled by enquiry and appointment so the diamond, budget and design can be checked properly.
Can I choose natural or lab-grown diamonds for an engagement ring?
Yes. Diagem can guide you through both GIA-certified natural diamonds and IGI-certified lab-grown diamonds, depending on your budget, timing and preference.
Where can I view engagement-ring diamonds?
Diamond viewings are arranged in Johannesburg. Cape Town appointments may be arranged with David by prior arrangement.
Are lab-grown diamonds real diamonds?
Yes. Lab-grown diamonds are real diamonds with the same crystal structure as natural diamonds. Diagem explains the difference in origin, value and certificate type so you can choose the right centre stone for the ring.
Tell us what you’re looking for
Start your engagement-ring enquiry.
Send David your preferred diamond shape, approximate budget, timing and the kind of ring you have in mind. He’ll help you compare options and arrange the next step when you’re ready.