GemTrove
Princess Cut Diamonds
Princess cut diamond guide covering square proportion, sharp corners, modified brilliant faceting, GIA reporting context, natural and lab-grown options and protective ring settings.
Diamond Shape Education Guide
Princess Cut Diamonds: Sparkle, Square Proportion & Buying Guide
Princess cut diamonds are admired for their clean square outline, sharp corners and brilliant sparkle. GemTrove helps compare natural and lab-grown princess diamonds by ratio, symmetry, polish, corners, colour, clarity and report details.
What is a princess cut diamond?
A princess cut diamond is a square or slightly rectangular modified brilliant diamond with sharp corners and lively faceted appearance.
- Square or gently rectangular outline
- Modified brilliant faceting
- Sharp tips that benefit from protective settings
Why princess diamonds are popular
Princess cuts suit clients who appreciate crisp lines, symmetry and contemporary geometry while still wanting brilliant-style sparkle.
- Strong geometric centre-stone appearance
- Lively pattern of light and movement
- Versatile in solitaire, pavé, halo, three-stone and contemporary designs
Square modified brilliant terminology
Laboratory reports commonly describe princess cut diamonds as square modified brilliants because the outline is square and the faceting is brilliant-inspired.
- Princess cut is the popular trade name
- Square modified brilliant is a common report description
- Rectangular modified brilliant may describe visibly longer stones
Best ratio for a princess cut diamond
For a square princess cut, a ratio close to 1.00 is generally preferred. Ratios above about 1.05 begin to appear more rectangular.
- 1.00–1.03 reads very square
- 1.04–1.05 still usually reads as square with mild variation
- Above 1.05 begins to look rectangular
Corner protection and ring setting
The four pointed corners define the princess shape but are more exposed to impact than rounded shapes. Correct jewellery engineering matters.
- V-shaped claws are often used for protection
- Bezel or partial bezel settings can create a clean architectural look
- Avoid exposed corners for everyday rings
Cut evaluation for princess diamonds
Princess cuts are fancy-shaped diamonds, so GIA reports do not provide the same overall cut grade used for standard round brilliant diamonds.
- Review polish and symmetry
- Assess table, depth, face-up brilliance and corner appearance
- Use visual inspection, videos or in-person review where possible
Frequently Asked Questions
What is a princess cut diamond?
A princess cut diamond is a square or slightly rectangular modified brilliant diamond with sharp corners and a lively faceted appearance.
Why is a princess cut called a square modified brilliant?
Laboratory reports often describe a square princess cut as a square modified brilliant because it has a square outline and a brilliant-inspired facet arrangement.
What is a good ratio for a princess cut diamond?
A classic square princess diamond is usually close to a 1.00 ratio and should not exceed approximately 1.05:1 if it is intended to read as square.
Do princess cut diamonds receive a GIA cut grade?
No. Princess cuts are fancy-shaped diamonds and do not receive the same overall GIA cut grade used for standard round brilliant diamonds.
Are princess cut corners fragile?
The pointed corners are more exposed than rounded shapes and should be protected with suitable setting design such as V-prongs, secure claws or bezels.
Do princess diamonds sparkle well?
Yes. Princess diamonds use modified brilliant faceting, so a well-selected stone can show lively sparkle and strong visual presence.
Are princess cut diamonds available in natural and lab-grown options?
Yes. Princess cut diamonds are available as both natural and lab-grown diamonds, with ratio, polish, symmetry and corner protection important in both origins.
What ring settings suit princess cut diamonds?
Princess diamonds suit solitaire, cathedral, halo, hidden halo, pavé, channel-set, side-stone and three-stone ring designs.
Should clarity be checked carefully in princess diamonds?
Yes. Clarity should be reviewed stone by stone, especially near corners, table areas and prominent reflections visible from above.
Can GemTrove help me choose a princess cut diamond?
Yes. GemTrove can compare princess cut diamonds by ratio, report details, corner safety, origin, colour, clarity, polish, symmetry and custom design suitability.
Choose a Princess Cut Diamond with Confidence
GemTrove helps compare princess cut diamonds, natural and lab-grown options, square proportion, corner protection, certification and custom engagement ring design.