Radiant Cut Engagement Rings · Bedfordview, Johannesburg
Radiant-cut engagement rings, made to order in South Africa.
Radiant-cut diamond engagement rings combine a square or rectangular outline with brilliant-cut sparkle and clipped corners. Compare natural centre diamonds in the proportions you prefer, then commission a setting and metal to suit your style.
Every Prodiam radiant ring is made to order in our Bedfordview workshop, the centre stone cut on our own bench or sourced for you and set as a three-stone, halo or solitaire in the metal you choose. Natural, GIA-certified diamonds, priced on application, with insured delivery anywhere in South Africa.
Brief us on a radiant-cut ring See loose diamonds → Custom engagement rings →
A radiant cut from the Prodiam bench, yours made to order
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2.04 ct radiant cut, three-stone setting -
The same ring, the cropped corners in profile
A past radiant commission, photographed at the bench. Each ring is made to order around your chosen stone and priced on application; nothing shown is offered as stock.
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Natural diamonds only
We sell natural diamonds and diamond-set jewellery. Ask us about the grading report and available origin documentation for your chosen stone. Why we don’t sell lab-grown →
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Independent grading reports
The grading laboratory is shown per stone. Review its report and the individual diamond before choosing; sourced examples can include GIA, EGL and IGI.
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Insured delivery, SA & worldwide
Overnight across South Africa via Brink’s, G4S or our nominated jewellery courier. Insured worldwide dispatch via Ferrari Group and FedEx Custom Critical.
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14-day in-person exchange
In-person sales at the viewing room come with a 14-day exchange courtesy on stock pieces. Distance-sale CPA cooling-off applies.
Example settings · rendered design references
Settings that suit a radiant
The east-west radiant from our bench, plus the halo, four-claw and hidden-halo styles shown on other cuts. A radiant carries any of them.
East-west radiantLong stone, low profile.
Cushion haloSoft corners, warm metal.
Four-claw solitaireLighter claws, more diamond on show.
Emerald cut, hidden haloLong clean facets, quiet sparkle beneath.
These are examples, not a catalogue
We are a working bench, so we can make essentially anything: a design off this page, one of these changed, a piece you have seen elsewhere, a drawing, a photograph, or an heirloom reset into something new. Bring the idea in whatever form you have it and we will tell you what it takes and what it costs, before any work starts.
Message Prodiam on WhatsAppor send it through the contact page
Renders are illustrations of a design, not photographs of a piece in stock. The stones in the pictures are stand-ins; yours is the one you choose, certified, with its own report.
The radiant cut: emerald outline, brilliant sparkle
The radiant cut was designed to settle an old trade-off. Buyers loved the clean, straight-sided outline of an emerald cut but missed the fire of a round, so the radiant puts brilliant-style faceting, the same light-scattering geometry as a round, inside a rectangular or square outline with neatly cropped corners.
The result sparkles like a brilliant but holds the architectural lines of a step cut, and the cropped corners make it durable, with no sharp points to protect. It is the shape for someone who wants both.
Why a radiant hides colour and inclusions well
Because a radiant breaks light into so much sparkle, it is one of the most forgiving shapes on the two grades buyers worry about. The busy faceting disguises both body colour and small inclusions that would show plainly in an open cut, the practical opposite of an emerald cut.
That means a radiant can often carry a slightly lower colour and clarity grade and still look bright and white to the eye, which frees budget for carat or for the setting. We still select stones that face up clean and even, and show them to you under daylight so you can judge for yourself.
Three-stone and halo radiant settings
- Three-stone, a radiant centre flanked by tapered baguettes or trapezoids, the most classic radiant engagement setting, as on the ring shown above.
- Halo, a pavé frame that squares up the outline and adds light and size, matched to the centre on our bench.
- Solitaire, the radiant alone in a four-corner head, the cleanest way to show its outline and fire.
- Pavé shoulders, small diamonds set into the band to carry light down the finger, in any of the above.
Choosing a radiant
| Choice | What we make to order |
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| Length-to-width | ~1.00 for a square radiant; ~1.20–1.35 for the classic rectangle |
| Carat | From around 0.70 ct to 5 ct and above, to your budget and hand |
| Colour | D–F, or a near-colourless G–J that the faceting keeps looking white |
| Clarity | An eye-clean VS–SI, the busy facets forgiving of small inclusions |
| Metal | 18k white, yellow or rose gold, or platinum |
| Certification | GIA / EGL certified; report supplied with the stone |
Pricing is on application, the stone drives the figure, and you receive a firm ZAR quote, VAT inclusive, before any work begins.
How a radiant-cut ring is made to order
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Brief
Square or rectangular, carat, colour and clarity range, setting style, metal, budget and deadline. We respond within 24 hours.
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Choose the stone
We present GIA-certified radiant cuts at different ratios, on the daylight tray or by video, each with its report.
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Build & cast
The setting is built and cast in your chosen metal, with any side stones or halo matched at the bench.
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Set & finish
The radiant is set, the ring hand-polished to a mirror finish, and checked under loupe and microscope.
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Hand-over
Presentation at Bedfordview by appointment, or insured overnight courier nationwide. Certification and a written valuation included.
Comparing shapes? See the round brilliant, oval, princess and emerald cuts, or start from the loose diamonds on the bench. When you are ready, brief us and Darren will come back within 24 hours.
Radiant cut engagement rings: common questions
What is the difference between a radiant cut and an emerald cut?
They share a straight-sided outline with cropped corners, but they are faceted completely differently. An emerald cut is a step cut, long open facets that flash like a hall of mirrors. A radiant cut has brilliant-style faceting inside that same outline, so it sparkles like a round while keeping the clean rectangular shape. In short: same silhouette, opposite light behaviour.
The radiant is the choice if you love the emerald-cut outline but want fire rather than flashes.
Does a radiant cut hide colour and inclusions?
Yes, better than most shapes. The radiant’s busy brilliant faceting breaks light up into so much sparkle that it disguises both body colour and small inclusions, which would show more in an open cut like an emerald.
That means a radiant can often carry a slightly lower colour and clarity grade and still look bright and white to the eye, a practical way to put budget into carat or cut instead. We still choose stones that face up clean and even.
What is the difference between a square and a rectangular radiant?
It is the length-to-width ratio. A square radiant sits near 1.00 and reads as a softened square, sometimes called a cushion-radiant. A rectangular radiant, around 1.20 to 1.35, is the more classic engagement look, longer on the finger. Both are cut with the same brilliant faceting and cropped corners; it is purely a matter of the outline you prefer, and we will show you both so you can decide.
How much does a radiant cut engagement ring cost in South Africa?
There is no fixed price, a ring is priced on the stone it carries, its carat, colour, clarity and cut, plus the metal and setting. Because we cut our own diamonds on our Bedfordview bench rather than buying them in and marking them up, you pay a landed stone price plus transparent manufacturing. A radiant’s good rough-yield and its forgiveness on colour and clarity can also stretch a budget.
We quote a firm ZAR figure, including VAT, before any work begins.
Can you make a radiant cut engagement ring if I am not in Johannesburg?
Yes, clients commission radiant cut rings across South Africa. The stone and design conversation happens by video and WhatsApp, you approve the diamond and the setting, and the finished ring is delivered insured and overnight nationwide via Brink’s or G4S, with its certification and a written insurance valuation on request.