Portuguese Cut vs Round Brilliant Diamond

Faceting Styles

Portuguese Cut vs Round Brilliant

The same round shape.
Two very different sparkles.One modern benchmark, one vintage marvel.

These aren't two different shapes — both are round diamonds. The difference is how they're faceted. The Round Brilliant uses 57 to 58 facets engineered for maximum light return. The Portuguese Cut packs 160 or more facets into the very same round outline, for a layered, vintage sparkle all its own.

Both Round ShapeLab Grown DiamondsIGI Certified

Round Brilliant

57–58 facets

Portuguese Cut

160+ facets

Style One

Round Brilliant Cut

The Round Brilliant is the most purchased diamond in the world. Its 57 or 58 precisely angled facets have been refined over a century to return more light than any other cut — the definition of modern diamond sparkle: bright, clean, consistent flashes.

Above all it offers certainty. IGI assigns a formal cut grade, brilliance is the highest achievable, and the look never dates. It is the benchmark against which every other cut — including the Portuguese — is measured.

Facets

57 or 58 — engineered for maximum light return

Sparkle

Bold and clean — bright, consistent flashes

Cut Grade

IGI assigns a formal cut grade (Excellent to Poor)

Character

Timeless, precise, universally recognised

Style Two

Portuguese Cut

The Portuguese Cut is a round diamond too — but faceted with three rows of facets on the crown and three on the pavilion, giving 160 or more facets in all. Where the round brilliant flashes, the Portuguese shimmers: a layered, kaleidoscopic "crushed-ice" scintillation with real vintage character.

Its roots trace to 18th-century Europe, cut to blaze under candlelight. Today it's prized for exactly that antique, decorative brilliance — rare, intricate, and unmistakably individual. And thanks to that intricate faceting, a Portuguese cut tends to face up generously for its weight — a 1 carat can appear close to the size of a 1.2 carat round brilliant.

Facets

160 or more, up to around 200 — concentric rows on crown and pavilion

Sparkle

Layered and vintage — kaleidoscopic, crushed-ice scintillation

Face-Up Size

Generous — a 1ct can look close to a 1.2ct round

Character

Antique, decorative, distinctive

Side by Side

Portuguese Cut vs Round Brilliant — compared directly.

Same round shape, evaluated honestly on how they differ. Neither is "better" — they're built for different tastes.

	Round Brilliant	Portuguese Cut
Outline	Round — a perfect circle	Round — the very same circle
Facet Count	57 or 58 facets	160+ facets, up to around 200
Sparkle Character	Bold, clean, consistent flashes	Layered, kaleidoscopic crushed-ice shimmer
Overall Brilliance	Maximum, most consistent light return	Intense, layered fire from 160+ facets
IGI Cut Grade	Yes — formal Excellent-to-Poor grade	IGI certified; judged on symmetry & polish
Face-Up Size	Full spread for its carat	Faces up larger — a 1ct can look like ~1.2ct round
Availability	Widely available in every size	In stock at Variation, 0.5 to 5 carat
Cutting & Cost	Efficient, standardised	More rough lost; skilled cutting — often a premium
Character	Timeless, classic, universally recognised	Vintage, decorative, rare and individual
Best For	Classic brilliance and certainty	Distinctive, antique-inspired statement pieces

Choose the Round Brilliant if...

You want the most brilliant diamond ever created.

You want the most brilliant, brightest diamond ever engineered

You value a formal IGI cut grade to verify quality with certainty

You prefer a timeless look that will never feel dated

You want maximum recognition and easy resale

You like clean, bold flashes over busy, textured sparkle

You are buying for classic, traditional taste

Shop Round Cut Diamonds

Choose the Portuguese Cut if...

You want rare, vintage character and layered fire.

You want something rare that almost no one else will have

You love vintage, antique and candlelit aesthetics

You are drawn to layered, kaleidoscopic "crushed-ice" sparkle

You want a true conversation piece with real character

You appreciate intricate, old-world cutting craftsmanship

You are choosing a larger stone (around 2ct+) where the faceting sings

Shop Portuguese Cut Diamonds

The Verdict

Same shape — choose your sparkle.

Both are round lab grown diamonds; the difference is entirely in the faceting. The Round Brilliant is the engineer's diamond — maximum, measurable brilliance. The Portuguese Cut is the romantic's — rare, layered and full of vintage character.

Choose Round Brilliant if

Brilliance and certainty are the brief

You want the brightest, most recognised diamond in the world, backed by a formal IGI cut grade — a classic that has led for a century and will lead for the next.

Choose Portuguese Cut if

Rarity and vintage character speak louder

You want a round diamond hardly anyone else has — 160+ facets of layered, candlelit scintillation, with antique charm and unmistakable individuality.

Frequently Asked

Portuguese cut vs round brilliant.

The questions we hear most when customers weigh these two faceting styles. Still unsure? Talk to us directly.

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Are the Portuguese cut and round brilliant the same shape?

Yes — both are round in outline. The difference is purely the faceting. A round brilliant has 57 or 58 facets; a Portuguese cut applies 161 or more facets to that same round shape, in concentric rows on the crown and pavilion.

Which one sparkles more?

They sparkle differently. The round brilliant returns the most light overall — bright, clean, bold flashes. The Portuguese cut trades a little of that raw brilliance for a busier, layered, kaleidoscopic "crushed-ice" scintillation with more visible fire. Round is brighter; Portuguese is more textured.

How many facets does a Portuguese cut have?

Typically typically 160 or more, up to over 200, compared with the standard 57 or 58 of a round brilliant — roughly three times as many.

Does a Portuguese cut look bigger or smaller than a round brilliant?

If anything, larger. The intricate faceting means a Portuguese cut tends to face up generously for its weight — a 1 carat can appear close to the size of a 1.2 carat round brilliant, giving you more visual presence for the carat.

Does a Portuguese cut get an IGI cut grade?

Round brilliants receive a formal overall cut grade (Excellent to Poor), unique to that cut. A Portuguese cut is still fully IGI certified for carat, colour, clarity and lab grown origin, and its cut quality is judged through symmetry and polish — look for excellent symmetry so the many facets line up cleanly.

Is a Portuguese cut good for an engagement ring?

It can be a beautiful choice if you want something rare and vintage-inspired. It shows best in larger stones — around two carats and up — where the intricate faceting has room to shimmer. For a classic, maximally brilliant solitaire, the round brilliant is the safer pick.

Do you offer lab grown Portuguese cut diamonds?

Yes — we stock IGI certified lab grown Portuguese cut diamonds from around 0.5 up to 5 carat. Browse the collection or message us and we'll help you choose.

Why is the Portuguese cut rarer and often pricier?

Its complex faceting demands skilled, precise cutting and loses more of the rough diamond in the process, so it isn't mass-produced like the round brilliant. That rarity and craftsmanship can carry a premium — though lab grown keeps it far more accessible than a mined equivalent.

Ready to Choose?

Find your perfect round diamond.

Browse our IGI certified round brilliant and Portuguese cut lab grown diamonds — and we'll help you find exactly the right stone.

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