Radiant Cut Engagement Rings · Bedfordview, Johannesburg
Radiant-cut engagement rings, made to order in South Africa.
The radiant cut takes the clean, straight-sided outline of an emerald cut and fills it with brilliant faceting, so it sparkles like a round while keeping a crisp rectangular line, and its busy facets are forgiving on colour and clarity.
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
Mined-Earth, never lab-grown, by conviction, not price. Kimberley-Process documented from the mine of origin. Why we don’t sell lab-grown →
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GIA & EGL certified
Every loose stone certified by the GIA or EGL. Cert PDF supplied per stone.
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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.
These are not marketing prices. Every figure below is a certified stone available to us today at a price you could pay this afternoon, taken from our own live inventory on 3 September 2026 and refreshed each time the site is published. Not a teaser, not a from-price on something already sold.
What a radiant engagement ring costs
Almost all of the price is the centre stone. A one carat radiant at H colour and SI1 clarity is about R47 100, and we can reach 193 of them right now. That is roughly R3 000 more than the same stone as a round brilliant, which is scarcity rather than quality: fewer are cut, so fewer are cut well. The setting is a much smaller number on top and we make it here.
| Centre stone | Typical | Entry | Available | |
|---|---|---|---|---|
| half carat | R12 600 | R10 500 | 36 629 | See radiants → |
| 1 carat | R60 200 | R41 900 | 28 838 | See radiants → |
| 1.5 carat | R152 100 | R101 700 | 12 496 | See radiants → |
| 2 carat | R329 200 | R195 500 | 6 378 | See radiants → |
| 3 carat | R849 000 | R568 000 | 2 213 | See radiants → |
Typical is H colour and SI1 clarity, the spec most people buy and the one that looks white and clean to the eye. Entry is the honest floor at that weight, usually a warmer colour. Both are stones we can put in front of you this week.
Ask about a radiant See all 193 at one carat →
No two diamonds are the same
A table describes a market, not a stone. Two diamonds identical on paper can differ by a third in price and both figures be right: how well the stone is actually cut and how much light it returns, where the inclusions sit and whether the eye finds them, how strongly it fluoresces, and how keenly that one happens to be priced against the international trade benchmark on the day. We check every stone against that benchmark before we show it to anybody, and the number that matters is the one quoted in writing on the stone you actually choose.
Ask us what your budget buys Search the live inventory →
Prices last updated 3 September 2026, from live market stock, rounded up to the next R100. A written quote is exact and usually does better.
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 |
|---|---|
| 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, excl. 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 from Cape Town, Durban, Pretoria, Gqeberha and 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.