Princess Cut Lab-Grown Diamonds
A square modified brilliant with crisp corners and bold, fiery sparkle — modern, striking, and great value per carat.
What is a princess cut diamond?
The princess is a square modified brilliant — a square top with sharp 90° corners and an inverted-pyramid pavilion faceted for bold, fiery sparkle. Developed in the late 20th century, it's the most popular square shape and a modern classic, offering brilliant-cut sparkle in clean, contemporary lines.
Great value per carat
Because a princess cut keeps more of the original rough crystal than a round, you typically get more size and sparkle for your budget — one reason it's such a popular choice for engagement rings.
Protect the corners
The princess's pointed corners are its one vulnerability — they can chip if knocked. A setting that covers them with V-prongs (or a halo) protects the stone while showing it off. It's a simple step that keeps a princess looking sharp for life.
What to look for in a princess
- Ratio — a true square sits around 1.00–1.05.
- Clarity near the corners — check that inclusions aren't sitting where a prong can't protect them.
- Symmetry — even corners and a crisp square outline.
Use the filters above to set carat, colour, and clarity.
Why buy a princess from Stienhardt
Every Stienhardt princess is independently certified by IGI or GIA, graded for the full 4Cs, and conflict-free — all backed by free 30-day returns.
Ready for a setting? Explore our Princess engagement rings.
Princess Cut Lab-Grown Diamonds — frequently asked questions
What is a princess cut diamond?
A square modified brilliant — a square top with sharp corners and a pyramid-shaped pavilion faceted for bold, fiery sparkle. It's the most popular square cut.
Is a princess cut cheaper than a round?
Usually — a princess keeps more of the rough crystal than a round, so you tend to get more size and sparkle for your budget.
Do princess cut corners chip?
The sharp corners can chip if knocked. A setting with V-prongs or a halo protects them, which is what we'd recommend.
What ratio is best for a princess cut?
A true square princess sits around 1.00–1.05. Higher ratios look more rectangular.
Are princess cut lab grown diamonds real diamonds?
Yes — they're real diamonds, chemically and optically identical to mined stones, and recognized as diamonds by the FTC.
Are princess cut lab grown diamonds certified?
Yes. Every Stienhardt princess is independently certified by IGI or GIA and graded for the full 4Cs.
Does a princess cut sparkle a lot?
Yes — it's a brilliant-style cut, so it delivers bold, fiery sparkle in a clean square shape.
What setting suits a princess cut?
Solitaire with V-prongs, halo, three-stone, and channel-set bands all work well and protect the corners.
Can I set a princess cut into an engagement ring?
Absolutely. Choose your loose stone, then pick a setting and we'll mount it for you.
What is your return policy?
Free 30-day returns on diamonds and jewelry.