Portuguese Cut Lab Grown Diamonds
The Portuguese cut layers extra rows of facets for an intense, starburst sparkle with unmistakable antique character.
What is a Portuguese cut diamond?
The Portuguese cut is an antique-style cut defined by its extra rows of facets on both the crown and pavilion — many more than a standard brilliant. All those facets break light into a busy, dazzling pattern, giving the stone an intense, almost kaleidoscopic sparkle that's instantly recognisable.
Why the Portuguese cut sparkles differently
Where a modern round brilliant aims for big, bold flashes of light, the Portuguese cut's additional facet rows create finer, more numerous flashes — a 'starburst' or crushed-ice scintillation with real vintage character. It's a cut for someone who wants their diamond to look distinctive, not standard.
What to look for in a Portuguese cut
- Symmetry — with so many facets, even, well-aligned faceting is what makes the sparkle sing.
- Shape — Portuguese cuts come in round and other outlines; pick the silhouette you love.
- Colour & clarity — the busy faceting hides small inclusions well, so eye-clean VS–SI stones perform beautifully.
Use the filters above to set your preferences.
Why buy a Portuguese cut from Stienhardt
The Portuguese cut is a specialty few jewellers stock. Every Stienhardt stone 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 Portuguese engagement rings.
Portuguese Cut Lab Grown Diamonds — frequently asked questions
What is a Portuguese cut diamond?
An antique-style cut with extra rows of facets on the crown and pavilion, producing an intense, kaleidoscopic sparkle.
Why does a Portuguese cut sparkle so much?
The additional facet rows split light into many fine flashes — a 'starburst' or crushed-ice scintillation rather than a few big flashes.
How is a Portuguese cut different from a round brilliant?
A round brilliant has fewer, larger facets for bold flashes; the Portuguese cut adds facet rows for a busier, more vintage sparkle.
Are Portuguese 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 Portuguese cut lab grown diamonds certified?
Yes. Every Stienhardt Portuguese cut is independently certified by IGI or GIA and graded for the full 4Cs.
Does the Portuguese cut hide inclusions well?
Yes — the busy faceting helps mask small inclusions, so eye-clean VS–SI stones look excellent.
What shapes does the Portuguese cut come in?
Most often round, though other outlines exist. Choose the silhouette you prefer.
Can I set a Portuguese cut into a ring?
Yes. Choose your loose stone, then pick a setting and we'll mount it for you.
Are Portuguese cut diamonds more expensive?
Lab grown Portuguese cut diamonds cost far less than mined stones of the same size and quality, so you get more diamond for your budget.
What is your return policy?
Free 30-day returns on diamonds and jewelry.