Princess Cut Diamond Rings: key options
The princess cut is a square outline with brilliant faceting — sharp and contemporary from above, with the fire of a round brilliant. It is the most popular square shape, and it has one significant practical advantage: because it is cut from the rough with far less waste than a round, it costs noticeably less per carat.
It also has one significant vulnerability, and everything about setting a princess cut follows from it: the four corners are the weak points. They are the thinnest part of the stone and the part most likely to chip. Protecting them is not optional. This page is about buying a princess cut ring; for choosing the stone itself, see princess cut diamonds.
Styles, shapes and setting combinations
- Four-prong solitaire with corner-covering prongs — the standard and correct arrangement. Each prong sits over a corner, so the same prongs that hold the stone also shield its weakest points. Ask specifically that the prongs cover the corners rather than the sides.
- Bezel or part-bezel — the most protective option, enclosing the corners completely. The best choice for anyone hard on their hands.
- Halo — a square halo echoes the outline and adds a further layer of metal and small stones around the corners, which is protective as well as decorative.
- Channel-set with square accents — princess-cut side stones set into the band, giving a continuous geometric line.
- Three-stone — a princess centre with tapered baguettes, a strongly architectural combination.
The princess cut also pairs unusually well with a straight wedding band, since its flat sides sit flush without the gap a round or oval can leave. That is a genuine practical advantage worth weighing. Compare styles at engagement ring settings.
What to compare: cut quality, corner protection, symmetry and setting security
- Corner protection, first and always. Look at how the setting engages each corner. If a corner is exposed, the ring is a chip waiting to happen — and a chipped princess cut usually cannot be repaired without recutting the whole stone.
- Cut quality, judged by eye. There is no overall cut grade for this shape, so read the depth and table percentages and then look at the stone. Princess cuts are frequently cut deep to retain weight, which makes them look small for their carat.
- Symmetry. The outline should be genuinely square, with corners at matching angles and equal length sides. Asymmetry is more visible in a geometric shape than in a curved one.
- Face-up size versus weight. Ask for millimetre measurements. A deep princess cut can carry substantial hidden weight below the girdle.
- Setting security overall. Test the ring against knitwear. Sharp corners in an inadequate setting catch readily.
Diamond quality and grading considerations
Graded on the characteristics in GIA’s grading methodology, with shape-specific considerations.
- No overall cut grade. As with all fancy shapes, expect polish, symmetry and proportion figures rather than a single letter. Depth percentage is the number to watch here, since deep cutting is common in princess cuts.
- Colour shows in the corners. Body colour tends to concentrate at the corners of a princess cut, so a warm tint can be more apparent than the grade suggests, particularly in white metal.
- Clarity is reasonably forgiving. The brilliant faceting disguises small inclusions well — but check the plot for anything near a corner, since an inclusion there compounds the existing structural weakness.
- Verify the report on the issuing laboratory’s database and confirm origin and treatment in writing.
Price factors and budget trade-offs
The princess cut is among the best-value shapes on a per-carat basis, because a square outline maps efficiently onto the natural octahedral form of rough diamond — far less material is lost than in cutting a round.
- Lower cost per carat than a round of comparable grades — the shape’s main financial advantage.
- Carat thresholds still dominate. Buying just under a round weight remains the largest saving available.
- Clarity is the easiest grade to reduce, subject to checking the corners on the plot.
- Colour deserves a little more attention than in a round, given corner concentration — or pair it with warm metal and take the saving.
- Do not economise on the setting. This is the one shape where a cheap mount genuinely risks the stone.
See diamond ring price South Africa. Quotes are dated as availability and metal rates move.
Living with a princess cut
A few practical habits make a real difference over the life of this ring. Have the corner prongs checked periodically, particularly if the ring is worn daily — a prong that has worn thin at a corner is the warning sign before a chip, and re-tipping is a routine repair while recutting a chipped stone is not. Take the ring off for heavy manual work, sport and anything involving gloves, since a square corner catches where a round would slide past.
Cleaning is straightforward: warm water, a little mild detergent and a soft brush, paying attention to the underside of the stone where residue collects and dulls the light coming back through. Tell any jeweller working on the ring that the centre stone is a princess cut before they begin, so the corners are handled appropriately during sizing or repair.
Who this option suits
- Buyers who want a modern, geometric look with full brilliant sparkle.
- Anyone wanting more stone per rand than a round brilliant delivers.
- Buyers who want a straight wedding band to sit flush without a shaped band.
- Longer fingers, which the square outline suits; on very short fingers it can read wide.
- Less suitable for very hands-on work unless bezel-set, given the corner vulnerability.
Related options and how to enquire
For the stone itself, princess cut diamonds. Compare other square and rectangular outlines at radiant cut diamond rings, cushion cut diamond rings and emerald cut diamond rings. For all outlines, diamond shapes. For a proposal, engagement rings.
Explore diamond ring options and request buying guidance
Tell us the size and budget you have in mind and what the wearer does with their hands. We will show princess cuts with their measurements and proportions, and recommend a setting that genuinely protects the corners — which matters more in this shape than in any other.