Radiant Diamond 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
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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
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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
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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
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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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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
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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 Diamond Rings NZ — Brilliant Sparkle, Bolder Shape, Every Occasion

The radiant cut achieves something no other rectangular diamond shape manages: it delivers the fire and sparkle of a round brilliant within an elongated or square outline. The oval softens and elongates. The emerald reflects quietly. The princess angles sharply. The radiant does what none of them do — returns the full visual intensity of round-brilliant light performance in a geometric rectangular form. For any occasion where you want a non-circular diamond ring with maximum sparkle, the radiant is the answer.

At TJ Diamond, radiant cut diamond rings are handcrafted in our Auckland studio for every occasion — engagement, anniversary, fashion, and self-purchase. The trimmed corners of the radiant make it one of the most practical brilliant cuts for daily wear across all ring styles, and this is worth understanding before any other consideration.

Henry Grossbard — The 1977 Innovation That Changed Rectangular Diamonds

The radiant cut was created in 1977 by Henry Grossbard of the Radiant Cut Diamond Company in New York. Before Grossbard's invention, rectangular diamonds were cut using step-cut facets — the flat, parallel planes of the emerald cut — which produced reflective depth but not the fire and scintillation of a brilliant-cut stone. No rectangular diamond had ever been cut with brilliant-cut facets throughout.

Grossbard applied brilliant-cut triangular and kite-shaped facets to both the crown and pavilion of a rectangular diamond with trimmed corners. The result was the first cut to deliver round-brilliant-level sparkle in a non-round outline. He named it 'radiant' for precisely this quality. Over forty years later, the radiant remains the only rectangular brilliant cut that competes directly with a round for fire and light return.

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

Trimmed Corners — Why the Radiant Is Safer Than the Princess

This is the most practically important distinction between the radiant and the princess cut, and it applies equally to engagement rings, anniversary rings, and fashion pieces. The princess cut has four sharp, pointed 90-degree corners that are the shape's most structurally vulnerable points. A direct impact at a corner concentrates force on the single sharp edge and is susceptible to chipping. Princess cut diamonds require V-shaped corner prongs to protect each tip regardless of the ring style.

The radiant cut has four trimmed corners, giving it an octagonal rather than true-square outline. These trimmed corners distribute any impact across the broader bevelled edge rather than concentrating it at a sharp point. There is no corner chipping risk, no special prong requirement, and significantly greater freedom in setting design. For buyers choosing between a square brilliant-cut diamond for any occasion, the radiant offers comparable sparkle with superior daily-wear practicality across every setting and ring style.

Three Comparisons — Radiant vs Emerald, Princess, and Elongated Cushion

Radiant vs emerald cut

Same outline, different facets, different effect. The emerald cut uses step-cut facets producing the hall-of-mirrors reflective quality — elegant, architectural, quiet. The radiant uses brilliant-cut facets throughout, producing maximum fire and sparkle. Choose emerald for sophisticated depth; choose radiant for maximum brilliance in the same shape.

See our emerald cut engagement rings collection for direct comparison.

Radiant vs princess cut

Both are square or rectangular brilliant cuts. The key structural difference: princess has sharp corners requiring V-prong protection, radiant has trimmed corners that are safer for daily wear across all occasions. Same sparkle class, different corner profile and safety consideration.

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

Radiant vs elongated cushion

Both are elongated brilliant-cut rectangles. The distinction is in character: radiant has sharp, precisely defined edges and angular trimmed corners, producing a geometric, architectural appearance. Elongated cushion has softer, rounded edges and corners, producing a warmer, more romantic look. Radiant = geometric precision; elongated cushion = vintage warmth. Both deliver excellent brilliance.

See our oval diamond rings collection for the elongated shape comparison in a non-rectangular form.

Square or Elongated — Choosing Your Radiant's Proportions

Square radiant (L-W ratio 1.00 to 1.05): A compact, symmetrical square with trimmed corners. Sits evenly on the finger with strong geometric presence. Suits buyers who want a square diamond without the corner vulnerability of a princess cut.

Elongated radiant (L-W ratio 1.20 to 1.35): A clearly rectangular outline with a strong finger-lengthening effect. The elongated radiant has grown significantly in popularity in New Zealand in 2024-25, driven by the broader trend toward elongated shapes and the influence of Jennifer Lopez's original engagement ring, which was an elongated pink radiant cut that popularised the silhouette significantly.

Ratios between 1.05 and 1.20 sit in an ambiguous middle zone. Most buyers find they prefer either the clearly square or clearly elongated proportion. Our jewellers show examples of both at our Auckland studio.

Occasions for Radiant Cut Diamond Rings

  • Engagement ring, radiant engagement rings: the radiant's brilliant sparkle and trimmed corner safety make it a compelling contemporary engagement ring choice, particularly for buyers choosing between a square and a round.

  • Solitaire for any occasion, solitaire engagement rings: a plain-band radiant solitaire in platinum or yellow gold is equally appropriate as an anniversary piece, a self-purchase fashion ring, or a significant gift.

  • Anniversary ring: the square or elongated radiant's geometric precision makes it one of the most architecturally distinctive anniversary ring choices. A bezel-set elongated radiant in yellow gold is a particularly bold anniversary statement.

  • Self-purchase or fashion ring: the elongated radiant is one of the fastest-growing fashion ring choices in New Zealand in 2025. Its strong horizontal axis in an east-west orientation creates a distinctly contemporary statement.

  • Gift: the radiant's geometric boldness and broad setting compatibility make it appropriate across ages and personal styles, particularly for buyers who want something more distinctive than a round or oval.

Natural and Lab-Grown Radiant Cut 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 and ovals, meaning specific length-to-width ratios may require sourcing from our network rather than on-hand stock. Our Auckland team handles this sourcing as part of every radiant consultation. Explore our lab-grown diamond collection for the full range within your budget.

The TJ Diamond Commitment

Every radiant cut diamond ring is completed in our Auckland studio and viewed by you in person before the final balance is due. From $999 NZD across all occasions and ring styles. Contact us to book a studio consultation, where our jewellers show square and elongated radiant diamonds side by side for direct proportion comparison.

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

{"type":"root","children":[{"type":"heading","children":[{"type":"text","value":"Q1: What is a radiant cut diamond ring?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"A radiant cut diamond ring features a diamond with a rectangular or square outline, trimmed corners, and brilliant-cut facets applied across both the crown and pavilion. Created in 1977 by Henry Grossbard, it was the first diamond cut to combine brilliant-cut facets with a rectangular outline — delivering round-brilliant-level fire and sparkle within a non-circular shape. Radiant cut diamond rings suit every occasion — engagement, anniversary, fashion, and self-purchase — in both square (length-to-width ratio 1.00-1.05) and elongated (1.20-1.35) proportions. The trimmed corners make the radiant more durable for daily wear than a princess cut, which has sharp unprotected corners."}]},{"type":"heading","children":[{"type":"text","value":"Q2: Who invented the radiant cut and when?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"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 cutting traditions previously kept separate: the step-cut facets of rectangular shapes like the emerald cut, and the brilliant-cut facets of round diamonds. Before 1977, no rectangular diamond had ever been cut with brilliant-cut facets throughout. Grossbard applied brilliant-cut triangular and kite-shaped facets to both the crown and pavilion of a rectangular diamond with trimmed corners, creating the first cut to deliver round-brilliant-level light performance in a non-round outline. The name 'radiant' refers directly to this achievement."}]},{"type":"heading","children":[{"type":"text","value":"Q3: What is the difference between a radiant cut and a princess cut diamond ring?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"Both are brilliant-cut square or rectangular diamonds with similar light performance, but they differ critically in corner design. A princess cut has four sharp, pointed 90-degree corners, which are the shape's most structurally vulnerable points and require V-shaped corner prongs to protect against chipping. A radiant cut has four trimmed corners, giving it an octagonal rather than true-square outline. These trimmed corners make the radiant significantly safer for daily wear across all ring styles and occasions, with no corner chipping risk and no special prong requirement. Visually, the princess reads as a pure square with pointed corners; the radiant reads as a square or rectangle with slightly bevelled corners. For buyers choosing between the two, the radiant offers comparable sparkle with superior daily-wear practicality."}]},{"type":"heading","children":[{"type":"text","value":"Q4: What is the difference between a radiant cut and an emerald cut diamond ring?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"Both are rectangular diamonds with trimmed corners, but they produce fundamentally different visual effects. The emerald cut uses step-cut facets, creating the famous hall-of-mirrors reflective quality — broad, sweeping reflections and less fire than a brilliant cut. The radiant cut uses brilliant-cut facets throughout, producing maximum fire and sparkle within the same rectangular outline. In practical terms: choose the emerald if you want architectural elegance, depth, and quiet sophistication. Choose the radiant if you want the elongated shape but with the high-contrast sparkle of a round brilliant."}]},{"type":"heading","children":[{"type":"text","value":"Q5: What is the ideal length-to-width ratio for a radiant cut diamond ring?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"Radiant cut diamonds come in two distinct proportion categories. Square radiant: a length-to-width ratio of 1.00 to 1.05 produces a nearly square diamond that reads cleanly as a square with trimmed corners. Elongated radiant: a ratio of 1.20 to 1.35 produces a clearly rectangular diamond with a strong finger-lengthening effect, similar to an elongated oval but with sharper geometric edges. Ratios between 1.05 and 1.20 sit in an ambiguous zone that reads as neither clearly square nor clearly elongated — most buyers prefer to choose one of the two characterised proportions. The elongated radiant has grown significantly in popularity in New Zealand through 2024-25, partly driven by the broader trend toward elongated diamond shapes."}]},{"type":"heading","children":[{"type":"text","value":"Q6: What occasions suit radiant cut diamond rings?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"Radiant cut diamond rings suit every fine jewellery occasion. As an engagement ring, the radiant's brilliant sparkle and versatile proportions make it a compelling contemporary choice. As an anniversary ring, the square or elongated radiant creates a bold geometric statement that reads as deliberately chosen rather than conventional. As a self-purchase or fashion ring, the elongated radiant in particular has become one of the most popular contemporary fashion ring choices in New Zealand in 2024-25, driven by its strong elongating character and geometric precision. As a gift, the radiant's distinctive character and broad setting compatibility make it suitable for a range of personal styles."}]},{"type":"heading","children":[{"type":"text","value":"Q7: What settings suit radiant cut diamond rings?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"The radiant cut's trimmed corners provide greater setting flexibility than the princess cut, because there are no sharp points requiring specific V-prong protection. A four-corner prong solitaire with prongs at the trimmed corners is the most classic setting. A bezel setting encircles the entire radiant outline in a clean metal frame, emphasising its geometric character. A hidden halo creates a floating sparkle effect beneath the radiant without adding visual complexity to the top profile. A three-stone setting with baguette or step-cut side stones creates an Art Deco-inspired composition. Channel settings suit the elongated radiant well, with the parallel sides aligning with the channel rails. All settings work in any metal."}]},{"type":"heading","children":[{"type":"text","value":"Q8: How much do radiant cut diamond rings cost in NZ?","bold":true}],"level":3},{"type":"paragraph","children":[{"type":"text","value":"Radiant cut diamond rings at TJ Diamond start from $999 NZD. Radiant cut diamonds are typically priced comparably to or slightly below equivalent round brilliants per carat, 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 diamond carat weight, colour, clarity, length-to-width ratio, setting style, and metal. Because the radiant cut is produced in smaller volumes than rounds and ovals, specific ratios may require sourcing from our network, which our Auckland team handles at no additional charge."}]}]}