Radiant Engagement Rings

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4-Claw Radiant Cut Solitaire Diamond Ring - Rose Gold 4-Claw Radiant Cut Solitaire Diamond Ring - Rose Gold
4-Claw Radiant Cut Solitaire Diamond Ring - Rose Gold
From $1,721.00
From $1,721.00
4-Claw Radiant Cut Solitaire Diamond Ring - White Gold 4-Claw Radiant Cut Solitaire Diamond Ring - White Gold
4-Claw Radiant Cut Solitaire Diamond Ring - White Gold
From $1,721.00
From $1,721.00
4-Claw Radiant Cut Solitaire Diamond Ring - Yellow Gold 4-Claw Radiant Cut Solitaire Diamond Ring - Yellow Gold
4-Claw Radiant Cut Solitaire Diamond Ring - Yellow Gold
From $1,721.00
From $1,721.00
6-Claw Radiant Cut Solitaire Diamond Ring - Rose Gold 6-Claw Radiant Cut Solitaire Diamond Ring - Rose Gold
6-Claw Radiant Cut Solitaire Diamond Ring - Rose Gold
From $1,721.00
From $1,721.00
6-Claw Radiant Cut Solitaire Diamond Ring - White Gold 6-Claw Radiant Cut Solitaire Diamond Ring - White Gold
6-Claw Radiant Cut Solitaire Diamond Ring - White Gold
From $1,721.00
From $1,721.00
6-Claw Radiant Cut Solitaire Diamond Ring - Yellow Gold 6-Claw Radiant Cut Solitaire Diamond Ring - Yellow Gold
6-Claw Radiant Cut Solitaire Diamond Ring - Yellow Gold
From $1,721.00
From $1,721.00
4-Claw Cushion Cut Solitaire Diamond Ring - Rose Gold 4-Claw Cushion Cut Solitaire Diamond Ring - Rose Gold
4-Claw Cushion Cut Solitaire Diamond Ring - Rose Gold
From $1,721.00
From $1,721.00
4-Claw Cushion Cut Solitaire Diamond Ring - Yellow Gold 4-Claw Cushion Cut Solitaire Diamond Ring - Yellow Gold
4-Claw Cushion Cut Solitaire Diamond Ring - Yellow Gold
From $1,721.00
From $1,721.00
4-Claw Cushion Cut Solitaire Diamond Ring - White Gold ( Platinum ) 4-Claw Cushion Cut Solitaire Diamond Ring - White Gold ( Platinum )
4-Claw Cushion Cut Solitaire Diamond Ring - White Gold ( Platinum )
From $1,721.00
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4-Claw Emerald Cut Solitaire Diamond Ring - Rose Gold 4-Claw Emerald Cut Solitaire Diamond Ring - Rose Gold
4-Claw Emerald Cut Solitaire Diamond Ring - Rose Gold
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From $1,721.00
4-Claw Emerald Cut Solitaire Diamond Ring - Yellow Gold 4-Claw Emerald Cut Solitaire Diamond Ring - Yellow Gold
4-Claw Emerald Cut Solitaire Diamond Ring - Yellow Gold
From $1,721.00
From $1,721.00
4-Claw Heart Solitaire Diamond Ring - Yellow Gold 4-Claw Heart Solitaire Diamond Ring - Yellow Gold
4-Claw Heart Solitaire Diamond Ring - Yellow Gold
From $1,721.00
From $1,721.00
4-Claw Heart Solitaire Diamond Ring - Rose Gold 4-Claw Heart Solitaire Diamond Ring - Rose Gold
4-Claw Heart Solitaire Diamond Ring - Rose Gold
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From $1,721.00
4-Claw Heart Solitaire Diamond Ring - White Gold (Platinum) 4-Claw Heart Solitaire Diamond Ring - White Gold (Platinum)
4-Claw Heart Solitaire Diamond Ring - White Gold (Platinum)
From $1,721.00
From $1,721.00
4-Claw Marquise Cut Solitaire Diamond Ring - White Gold ( Platinum) 4-Claw Marquise Cut Solitaire Diamond Ring - White Gold ( Platinum)
4-Claw Marquise Cut Solitaire Diamond Ring - White Gold ( Platinum)
From $1,721.00
From $1,721.00
4-Claw Marquise Cut Solitaire Diamond Ring - Yellow Gold 4-Claw Marquise Cut Solitaire Diamond Ring - Yellow Gold
4-Claw Marquise Cut Solitaire Diamond Ring - Yellow Gold
From $1,721.00
From $1,721.00

Radiant Cut Engagement Rings NZ — Brilliant Sparkle, Bolder Shape

The radiant cut achieves something no other diamond shape manages: it delivers the sparkle and fire of a round brilliant within a rectangular or square outline. The oval elongates, the emerald reflects, the princess angles, the cushion softens. The radiant does all of this while returning light to the eye with the same class of brilliance as the round cut that has set the standard for over a century. For buyers who want the elongated, non-circular shape of a rectangular diamond but refuse to trade away the sparkle performance of a brilliant cut, the radiant is the answer.

At TJ Diamond, every radiant cut engagement ring is handcrafted in our Auckland studio. The radiant is one of the less commonly held shapes in New Zealand jewellery stores, which means selecting the right length-to-width ratio and diamond quality for your specific hand and setting often requires the kind of individual attention that only a bespoke jeweller in Auckland can provide.

The Origin of the Radiant Cut — A 1977 Invention

The radiant cut was created in 1977 by Henry Grossbard of the Radiant Cut Diamond Company in New York. Grossbard's specific innovation was combining two previously separate cutting traditions: the step-cut facets used in rectangular shapes like the emerald cut, and the brilliant-cut facets used in round diamonds. Before 1977, these two approaches had never been successfully applied together across the crown and pavilion of a single rectangular diamond.

Grossbard applied brilliant-cut triangular and kite-shaped facets across both the crown and pavilion of a rectangular diamond with trimmed corners, creating the first cut to achieve round-brilliant-level light performance in a non-round outline. The name he chose, 'radiant,' was a direct reference to this quality: a rectangular diamond that radiates light with the intensity of a round brilliant. This is still what separates the radiant cut from every other rectangular diamond.

Henry Grossbard's 1977 innovation was the first time brilliant-cut facets had ever been applied to a rectangular diamond. The radiant is the only rectangular cut that matches round-brilliant sparkle.

The Three Comparisons Radiant Buyers Always Ask About

Buyers researching the radiant cut almost always compare it to three other shapes. Here is the definitive answer to each comparison:

Radiant vs emerald cut

Both are rectangular diamonds with trimmed corners. The distinction is in the facet pattern and the resulting visual quality. The emerald cut uses step-cut facets, flat parallel planes that produce the reflective hall-of-mirrors effect but deliver less fire and brilliance than a round diamond. The radiant uses brilliant-cut facets throughout, producing maximum sparkle and fire within the same rectangular outline. The emerald cut is the choice for buyers who want architectural elegance and quiet depth. The radiant is the choice for buyers who want the same elongated shape with high-contrast, maximum sparkle.

See our emerald cut engagement rings collection for a direct comparison of both styles.

Radiant vs princess cut

Both are brilliant-cut diamonds producing a square or rectangular outline at high light performance. The critical structural difference: the princess cut has four sharp, pointed 90-degree corners that require specific V-tip prong protection and carry a chipping risk if struck. The radiant cut has four trimmed corners, giving it an octagonal rather than true-square outline, making it significantly safer for daily wear with no corner vulnerability to manage. For buyers choosing between the two, the radiant offers comparable sparkle with superior daily-wear practicality.

See our princess cut engagement rings collection for a direct style comparison.

Radiant vs elongated cushion cut

This is the most common radiant comparison in the NZ market in 2024-25, driven by the surge in elongated shapes. Both are rectangular brilliant-cut diamonds, but they have fundamentally different edge and corner profiles. The radiant cut has sharp, precisely defined edges and trimmed but angular corners, giving it a clean, geometric, architectural character. The elongated cushion cut has softer, more rounded edges and corners, producing a gentler, more romantic appearance closer to an oval with soft squared edges. Radiant cuts look geometric and modern. Elongated cushion cuts look warm and vintage. Both deliver excellent brilliance.

See our cushion engagement rings collection for elongated cushion options alongside standard cushion cuts.

Square or Elongated — Choosing Your Radiant's Proportions

The radiant cut comes in two distinctly different proportions, determined by the length-to-width ratio:

Square radiant (L-W ratio 1.00 to 1.05): A true square outline with trimmed corners. Sits compactly on the finger with strong geometric presence. The square radiant is sometimes preferred by buyers who like the princess cut aesthetic but want the softer corner profile of the radiant.

Elongated radiant (L-W ratio 1.20 to 1.35): A clearly rectangular outline that creates a finger-lengthening effect similar to an oval. The elongated radiant is the more widely chosen proportion in 2024-25, partly driven by the broader trend toward elongated shapes and partly by celebrity influence. Jennifer Lopez's original engagement ring from Ben Affleck (the 2002 pink radiant) is among the most famous radiant cut rings in history, and while it was a distinctive pink colour, it popularised the elongated radiant silhouette significantly.

Ratios between 1.05 and 1.20 sit in an in-between zone that can read as neither clearly square nor clearly elongated. Most buyers prefer to select one of the two clearly characterised proportions rather than the ambiguous middle ground. Our jewellers can show you examples of both at our Auckland studio.

Setting Styles for Radiant Cut Engagement Rings

  • Four-corner solitaire, solitaire engagement rings: prongs at the trimmed corners hold the radiant cleanly without corner exposure. The most versatile and most popular radiant setting. The geometric character of the radiant reads clearly without distraction.

  • Hidden halo, halo engagement rings: a ring of diamonds beneath the radiant's girdle adds a floating sparkle visible from the side without adding visual complexity to the top profile. Particularly effective with elongated radiants where the rectangular outline should remain uninterrupted from above.

  • Bezel setting: a metal rim encircles the entire radiant outline, including the trimmed corners. Clean, modern, and very secure for daily wear. Particularly striking in yellow gold where the warm metal frames the cool diamond brilliance.

  • Three-stone with baguette sides, three stone engagement rings: a radiant centre flanked by two baguette-cut side stones creates a strongly Art Deco composition. The matching rectangular outlines of the radiant centre and the baguette sides produce a cohesive, architectural ring.

  • Channel setting: the elongated radiant sits within two parallel metal rails. The flat sides of the rectangular outline align naturally with the channel walls, creating a very secure and seamless look.

Natural and Lab-Grown Radiant Diamonds

Both natural and lab-grown radiant cut diamonds are available at TJ Diamond, each IGI or GIA certified. The radiant cut is produced in smaller volumes than rounds, ovals, and cushions, meaning specific length-to-width ratios may require sourcing from our network rather than from on-hand stock. Our Auckland team handles this sourcing as part of every radiant cut consultation at no additional charge. Explore our lab-grown diamond collection for the full range within your budget.

The TJ Diamond Commitment

Every radiant cut engagement ring is completed in our Auckland studio and viewed by you in person before the final balance is due. From $999 NZD. Contact us to book a studio consultation, or browse the collection above and filter by diamond type, setting style, and metal.

Our lifetime warranty covers all TJ Diamond radiant cut rings including prong maintenance, stone resetting, and professional polishing for the life of the ring.

 

Frequently Asked Questions

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This makes the radiant cut unique: it delivers the fire and brilliance of a round brilliant within a rectangular or square outline, giving buyers who want a non-circular shape the option of maximum sparkle rather than the quieter, reflective quality of a step-cut diamond."}]},{"type":"heading","children":[{"type":"text","value":"Q2: Who invented the radiant cut diamond?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"The radiant cut was created in 1977 by diamond cutter Henry Grossbard of the Radiant Cut Diamond Company in New York. Grossbard's innovation was combining two cutting traditions that had previously been kept separate: step-cut facets used in rectangular shapes like the emerald cut, and brilliant-cut facets used in round diamonds. He applied brilliant-cut facets to both the crown and pavilion of a rectangular or square diamond, creating the first cut to successfully deliver round-brilliant-level light performance in a rectangular form. The name 'radiant' refers directly to this radiant, brilliant quality achieved in a non-round outline."}]},{"type":"heading","children":[{"type":"text","value":"Q3: What is the difference between a radiant cut and an emerald cut?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"The radiant and emerald cuts are both rectangular diamonds with trimmed corners, but they produce completely different visual effects. The emerald cut uses step-cut facets, which are large, flat, parallel facets that create the famous hall-of-mirrors reflective effect but less fire and brilliance than a round diamond. The radiant cut uses brilliant-cut facets throughout, producing the maximum fire and sparkle of a brilliant cut within a rectangular outline. In practical terms: if you want the elongated rectangular shape but with the high-sparkle brilliance of a round diamond, choose the radiant. If you prefer the elegant, architectural step-cut reflection of the emerald cut, choose the emerald. Both are cut with trimmed corners for safety."}]},{"type":"heading","children":[{"type":"text","value":"Q4: What is the difference between a radiant cut and a princess cut?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"The key distinction between radiant and princess cuts is in the corners. Princess cuts have sharp, pointed 90-degree corners that are the most vulnerable structural feature of the shape and require specific V-tip prong protection. Radiant cuts have trimmed corners, giving them an octagonal outline rather than a true square. This corner trim makes the radiant significantly more durable and practical for daily wear, with less risk of corner chipping from accidental impacts. Visually, the princess cut reads as a pure square with pointed corners; the radiant cut reads as a square or rectangle with softer, bevelled corners. Both deliver brilliant-cut light performance at high levels."}]},{"type":"heading","children":[{"type":"text","value":"Q5: What is the difference between a radiant cut and an elongated cushion cut?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"Radiant and elongated cushion cuts are frequently compared because both are rectangular brilliant-cut diamonds. The distinction is in the corner and edge character. Radiant cuts have sharp, well-defined edges and precisely trimmed corners, producing a clean, geometric, architectural appearance. Elongated cushion cuts have softer, more rounded corners and edges, giving them a gentler, more romantic appearance closer to an oval with a rectangular footprint. Radiant cuts look more modern and geometric; elongated cushion cuts look more vintage and soft. Both deliver excellent brilliance. The choice is primarily aesthetic: angular precision versus rounded warmth."}]},{"type":"heading","children":[{"type":"text","value":"Q6: What is the ideal length-to-width ratio for a radiant cut diamond?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"For a radiant cut that reads as square: a length-to-width ratio of 1.00 to 1.05 is ideal, and is sometimes called a square radiant. For a radiant with a classic elongated rectangular look: a ratio of 1.20 to 1.35 is most popular, producing a clearly elongated stone with a strong finger-lengthening effect. Ratios between 1.05 and 1.20 sit between these two characters: not quite square and not quite elongated, which can read as slightly awkward. Most buyers find they prefer either the clearly square or clearly elongated proportions. Our jewellers will show you multiple ratios in person at the Auckland studio."}]},{"type":"heading","children":[{"type":"text","value":"Q7: What settings suit radiant cut engagement rings?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"The radiant cut's trimmed corners make it compatible with a wider range of settings than the princess cut, because there are no sharp points requiring specific V-prong protection. A four-corner prong solitaire works well, with prongs positioned at the trimmed corners. A bezel setting encircles the entire radiant outline in a clean metal frame, emphasising the geometric character. A hidden halo creates a floating effect that adds sparkle without competing with the rectangular outline. Channel settings suit the elongated radiant particularly well, with the parallel sides of the stone aligning with the channel rails. Three-stone radiant rings, particularly with baguette or step-cut side stones, create an Art Deco-inspired composition."}]},{"type":"heading","children":[{"type":"text","value":"Q8: How much do radiant cut engagement rings cost in NZ?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"Radiant cut engagement rings at TJ Diamond start from $999 NZD. Radiant cut diamonds are typically priced comparably to or slightly below equivalent round brilliants at the same quality grade, because the trimmed-corner rectangular outline can be cut from rough diamond crystal with relatively good efficiency. Lab-grown radiant cut diamonds are available in all our settings at significant additional savings. The total price depends on carat weight, colour, clarity, length-to-width ratio, metal, and setting complexity. Because the radiant cut is less widely produced than the round or oval, selection of specific ratios and qualities may require bespoke diamond sourcing, which our Auckland team handles as part of every consultation."}]}]}