What Makes the Princess Cut Lab-Grown Diamond Such a Smart Buy
If you want a big, brilliant, square stone without paying round-brilliant prices, the princess cut lab-grown diamond is the shape that does it best. It is the second most popular diamond cut in the world, it returns almost as much sparkle as a round, and because it wastes far less of the rough crystal during cutting, it costs noticeably less per carat. Add lab-grown pricing on top and you can finally reach the carat weight you actually wanted — instead of the one your budget forced you into.
This guide walks through exactly how to choose a princess cut lab-grown diamond that looks larger than it costs, stays bright and white face-up, and — just as importantly — will not chip at the corners a year after you buy it.
What Is a Princess Cut Lab-Grown Diamond?
The princess cut is a square (or slightly rectangular) brilliant cut, usually with 50 para 58 facets and sharp, pointed corners. It was developed in the 1980s specifically to keep more of the original rough crystal than a round brilliant does — round cutting wastes roughly half the stone, while a princess retains about 60% of it. That single fact is the reason a princess cut lab-grown diamond costs less per carat than a round of the same quality: there is simply less raw material thrown away.
Because it is a brilliant corte, with facets radiating from the center, a princess returns white light and rainbow fire in a way that square step cuts like the Asscher do not. If you love the clean geometry of a square stone but you do not want to give up sparkle, the princess is the cut that gives you both.
Why the Princess Cut Gives You More Carat for Your Money
Two things make a princess cut lab-grown diamond unusually good value, and together they are the main reason to choose it over a round.
1. Higher yield from the rough. A round brilliant loses about 50% of the rough crystal during cutting. A princess cut keeps roughly 60% of it. That lower waste is baked directly into the price — so a princess is typically 20–30% cheaper per carat than a round of the same carat, color and clarity.
2. A larger face-up area. Two stones of the same carat weight can look very different in size depending on how that weight is distributed. A princess cut carries more of its weight across its top surface than a round does, so it looks bigger on the finger for the same carat — and bigger still against a round of the same price, since you can afford more carats to begin with.
If your real goal is “the largest believable stone for my budget,” the princess is one of the most efficient shapes you can pick. For a fuller breakdown of where to spend and where to save on carat size, see our guide to the melhor tamanho de diamante cultivado em laboratório para o seu orçamento.
How to Choose a Princess Cut Lab-Grown Diamond
Choosing well comes down to five decisions. Get the first three right and the stone will look excellent; get the last two right and it will stay that way for decades.
1. Put Cut Quality First
With rounds, you can lean on a GIA “Excelente” cut grade. Princess cuts have no equivalent universal grade, so you have to judge cut yourself — and it matters more here than almost anywhere else, because a badly cut princess looks dark and lifeless no matter how clean or white it is.
Look for a princess described as “Ideal” ou “Muito bom” corte, and check the proportions: a length-to-width ratio close to 1.00–1.05 for a true square, a table around 65–75%, and a depth of 68–75%. The surest sign of a lively stone is even brightness with no dark cross or dead patches across the center. Nosso guide to the best cut grade for lab-grown diamonds goes deeper on the proportions to check before you pay more for a grade you may not need.
2. Clareza: VS Is the Sweet Spot
The princess cut’s brilliant facet pattern is excellent at hiding small inclusions, which means you do not need to pay for VVS clarity to get a clean-looking stone. A well-cut VS2 — and sometimes even a careful SI1 — will be eye-clean, because the facets scatter light in a way that masks the tiny marks a loupe would reveal.
This is one of the easiest places to save money without anyone ever noticing. The logic is the same reason VS often beats VVS on value across all lab-grown shapes — explained in full in our piece on quando a clareza do VS tem um valor melhor que o VVS.
3. Cor: Aim for G–H for the Best Balance
Square brilliant cuts can show a hint more color at the corners than rounds do, so going too far down the scale risks a faint warm tint. But you also do not need to chase D–F unless you are pairing the stone with a platinum or white-gold setting and you want it to read icy white.
Para a maioria dos compradores, G or H is the sweet spot: they face up white in yellow or rose gold and in white gold alike, and they cost meaningfully less than D–F. If you want to see exactly where the line falls, our breakdown of D-F vs G-H lab-grown diamond color shows what each grade looks like in practice.
4. Quilate: Choose by Face-Up Size, Not Just Weight
Because a princess cut looks larger than a round of the same carat, you can often step down in weight and still get the presence you pictured. A 1.5-carat princess can wear like a 1.7-carat round on the finger.
If you have your heart set on a headline number, a 2-carat princess cut lab-grown diamond is one of the most requested sizes — large enough to feel substantial, still far more affordable than a 2-carat round. For real-world pricing context, see what buyers actually pay in our 2 carat lab-grown diamond ring price guide for 2026.
5. Protect the Corners — Pick the Right Setting
This is the part many buyers miss, and it is the one that protects your investment. The princess cut’s sharp corners are its weak point: they are the thinnest part of the stone and the most exposed, so a sharp knock against a hard surface can chip them.
The fix is the setting. A bezel setting wraps metal all the way around the stone and is the most protective choice for a princess; V-prongs at each corner are the lighter-weight alternative. Either is far safer than four plain corner prongs. The trade-offs between a protective bezel and an open solitaire are laid out in our bezel vs solitaire comparison. And because a protective setting means the ring is worn hard for years, the metal matters too — our 14K vs 18K gold guide covers which holds up better for daily wear.
Is a Princess Cut Right for Your Hand?
A square brilliant sits on the hand differently than an elongated oval or marquise. On shorter fingers, a princess cut’s clean square outline can actually help the hand look longer and more balanced than a wide round does, because the eye reads the vertical diagonals. On larger hands, a princess in the 1.5–2 carat range fills the finger without looking lost. If you are still deciding between shapes for your hand size, nosso guia para o melhor formato de diamante para mãos pequenas compares how each cut wears.
What Should You Pay for a Princess Cut Lab-Grown Diamond?
Because the princess retains more of the rough and lab-grown production has driven prices down sharply, you are getting a genuinely large stone for a fraction of what the same carat would have cost mined, in a round, a few years ago. As a rough frame: a well-cut 1.5-carat G/VS2 princess cut lab-grown diamond is usually within reach of a mid-four-figure budget, and a 2-carat version is no longer the luxury-tier purchase it once was.
The price you actually pay depends on the cut, clareza, color and carat choices above — and on buying from a source that lists a real certificate rather than a seller’s own grading. Always verify the lab report before you commit; our guide on como verificar um certificado de diamante cultivado em laboratório online shows exactly how to check that the stone matches its paperwork, e IGI vs GIA para diamantes cultivados em laboratório explains which report makes the most sense for a lab-grown purchase.
Diamante cultivado em laboratório com corte princesa: Perguntas frequentes
Is a princess cut lab-grown diamond a real diamond?
Sim. A lab-grown diamond is physically, chemically and optically identical to a mined diamond — the same crystal structure, the same hardness, the same sparkle. A princess cut lab-grown diamond is simply that diamond shaped into the square brilliant cut described above.
Does a princess cut sparkle as much as a round?
Almost. The round brilliant is still the cut that returns the most light, but the princess is the closest square equivalent and is noticeably brighter than square step cuts like the Asscher. Para a maioria das pessoas, the difference in sparkle is far smaller than the difference in price.
Will the corners chip?
They can, if the stone is set in plain corner prongs and takes a hard knock. Choose a bezel or V-prong setting and chipping becomes a non-issue for daily wear.
Is princess or cushion cut better?
They are both popular square-ish cuts but look different: the princess has crisp corners and a more geometric, modern sparkle; the cushion has rounded corners and a softer, vintage glow. If you want sharp and brilliant, pick princess; if you want soft and romantic, pick cushion.
The Bottom Line
The princess cut lab-grown diamond is the shape to choose when your priority is a big, brilhante, square stone and you want every dollar to show on the finger. Pick a well-cut stone, settle on VS clarity and G–H color, size it by face-up area rather than carat alone, and protect those corners with a bezel or V-prong setting — and you will have a ring that looks far more expensive than it was.
If you would like help sourcing a specific princess cut lab-grown diamond to your budget and specs, start with our loose-stone-to-jewelry customization process or reach out to our team and we will shortlist options for you.