Princess Cut Engagement Rings

Princess Cut Engagement Rings NZ — Square, Sharp, Spectacular

The princess cut is the most popular square diamond shape in the world and the second most chosen engagement ring diamond after the round brilliant. Its appeal is immediately apparent: geometric precision combined with brilliant-cut light performance, producing a ring that reads as modern and architectural while delivering the fire and scintillation that make diamond engagement rings captivating. If you are drawn to clean angles and bold geometry rather than the soft curves of an oval or the flowing silhouette of a pear, the princess cut is the shape that delivers it most completely.

At TJ Diamond, every princess cut engagement ring is handcrafted in our Auckland studio with particular attention to corner setting, because the princess cut's four sharp corners require specific prong protection that most retailers do not explain. Understanding why matters before you choose a setting.

The Princess Cut — A Surprisingly Modern Diamond

Most buyers assume the princess cut is an ancient shape with centuries of history. It is not. The princess cut was created in 1979 by diamond cutters Betazel Ambar and Israel Itzkowitz. This makes it one of the newest diamond cuts in widespread use, and genuinely a product of the modern diamond industry rather than a historical tradition.

The cut was designed to solve a specific problem: how to produce a square diamond with maximum brilliance while wasting as little of the original rough diamond crystal as possible. Diamond rough forms naturally as an octahedron, an eight-sided shape with two four-sided pyramids. The princess cut maps almost perfectly onto half of this octahedron, meaning two princess cut diamonds can be produced from a single octahedral rough crystal with minimal waste. This manufacturing efficiency is one of the reasons princess cut diamonds are typically priced 20-30% below equivalent round brilliants of the same quality, because significantly less rough is wasted in cutting.

The princess cut is one of the newest diamond shapes — created in 1979, not in a Victorian jeweller's workshop. Its pricing advantage comes from efficiency, not compromise.

Corner Vulnerability — What Every Princess Cut Buyer Should Know

The princess cut's four sharp, 90-degree corners are its defining aesthetic feature. They are also its most structurally vulnerable point. When a round or oval diamond is knocked against a hard surface, the curved outline distributes the impact across the stone. When a princess cut diamond is knocked at a corner, the point of impact is concentrated at the corner's single edge, which is more susceptible to chipping.

This is not a reason to avoid the princess cut. It is a reason to choose the correct setting. Each corner of a princess cut diamond should be protected by a V-shaped prong, also called a corner claw or chevron prong, that cradles the corner edge and absorbs any accidental impact. A standard round prong at a princess cut corner leaves the corner partially exposed and provides significantly less protection.

TJ Diamond sets every princess cut diamond with V-shaped corner prongs as standard, and our jewellers inspect the corner protection of each setting before the ring leaves our Auckland studio. If you are looking at princess cut settings from other jewellers, always confirm that the corner prongs are specifically shaped for corner protection rather than simply adapted round prongs.

Princess vs Radiant — Understanding the Difference

The princess cut and the radiant cut are often confused because both are brilliant-cut diamonds with a square or rectangular outline. The distinction is in the corners:

Princess cut: Four sharp, pointed 90-degree corners. The outline is a true square with no corner trim. Creates a clean, geometric, architectural appearance. Corner vulnerability requires specific V-tip prong protection.

Radiant cut: Four trimmed corners, producing an octagonal outline rather than a true square. Slightly softer appearance than the princess. Less corner vulnerability due to the trim. More closely related to the emerald cut outline with brilliant-cut facets.

If you are drawn to the square outline but prefer a slightly safer corner profile, the radiant cut is worth considering. See our radiant cut engagement rings collection for comparison.

Setting Styles for Princess Cut Engagement Rings

The princess cut's geometric precision suits several setting styles particularly well, each with different implications for corner protection and visual character:

• Four-corner prong solitaire, solitaire engagement rings: the most classic princess setting. V-shaped prongs at each corner hold the stone securely while leaving the majority of the square face exposed for maximum light. The clean, minimalist look lets the square shape speak for itself.

• Channel setting: the princess sits within two parallel metal rails running along the sides of the stone. The rails protect the sides while the corners sit within the channel ends. A very secure option particularly suited to the flat sides of the square outline.

• Halo setting, halo engagement rings: a ring of smaller round diamonds surrounds the princess, significantly amplifying the perceived size and sparkle. The circular halo creates visual contrast with the square centre, making the geometry of the princess cut more pronounced by contrast.

• Bezel setting: a complete metal rim encircles the entire princess outline, including wrapping around each corner in a protective edge. The most secure option for active wearers and the cleanest, most architectural look. The corners are visible through the bezel edge rather than hidden.

• Pavé shoulders: diamonds set along the band shoulders add continuous sparkle that extends the geometric visual impact along the length of the ring.

The Colour Grade Consideration

Princess cut diamonds show colour slightly more readily than round brilliant diamonds because the larger corner facets can concentrate any warmth in the stone. For buyers who want a visually colourless princess cut in a white metal setting, a G or better colour grade is recommended. An H or I colour grade that would read as perfectly colourless in a round brilliant may show a faint warmth at the corners of a princess cut in platinum or white gold.

Choosing a princess cut in yellow gold mitigates this, because the warm metal tone absorbs the diamond's own warmth in the same way it does for oval and cushion cuts. See our notes on yellow gold engagement rings for more detail on the colour grade advantage of warm metal settings.

Princess vs Round — The Price Advantage

Because the princess cut can be produced from diamond rough with less waste than the round brilliant, it is typically priced 20-30% below equivalent round brilliants at the same colour, clarity, and cut quality. For buyers who want maximum brilliance within a budget but do not specifically require the round brilliant's circular outline, the princess cut delivers the same class of light performance at a more accessible price point. Lab-grown princess cut diamonds extend this advantage further. Explore our lab-grown diamond collection for the full range of options.

Natural and Lab-Grown Princess Cut Diamonds

Both natural and lab-grown princess cut diamonds are available at TJ Diamond, each IGI or GIA certified with every grade independently verified. Every princess cut diamond we select is assessed for corner condition and symmetry before setting. From $999 NZD. Contact us to book a studio consultation, or browse the collection above and filter by metal, setting style, and diamond type.

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