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Education›Lab Grown Diamond Guidance›Portuguese Cut Diamond — The Complete Guide
Lab Grown Diamond GuidanceFenora Guide8 min read

Portuguese cut diamond — the complete guide.

The Portuguese cut diamond has more facets than any other cut in the Fenora collection — significantly more than the 58 of a round brilliant. The result is exceptional fire and a complex, extraordinary light performance in a familiar round outline. This guide covers everything about the Portuguese cut.

01

What makes the Portuguese cut extraordinary

The Portuguese cut is one of the most faceted diamond cuts in existence. Where a standard round brilliant has 58 facets, the Portuguese cut has significantly more — typically 154 or more facets, arranged in a complex pattern that creates extraordinary light dispersion.

The round outline of the Portuguese cut is familiar — the same circular silhouette as a round brilliant. What is inside is different: the additional facets create more light interactions per unit of stone surface, producing exceptional fire (colour dispersion) and a complex, multi-layered sparkle that goes far beyond what a standard round brilliant produces.

The Portuguese cut was developed in Portugal and is associated with the Portuguese tradition of extremely high-facet-count diamond cutting. It is rare in fine jewellery use because the cutting complexity is significant — the additional facets require more precision and more time than standard brilliant cutting.

“The Portuguese cut is the shape for buyers who care most about how a diamond performs with light — more than about what shape it is, more than about size. If optical performance is the absolute priority, the Portuguese cut is in a category of its own.”
— Yash Chandpara, Founder
02

Portuguese cut vs round brilliant — how they differ

FactorRound BrilliantPortuguese Cut
Number of facets57–58154+ (varies by specific cutting design)
OutlineCircularCircular — same silhouette
BrillianceMaximum for 58-facet designComparable — high light return
Fire (colour dispersion)High — 0.044 dispersionExceptional — more facets create more light dispersion events
Sparkle characterClear, defined flashesComplex, multi-layered, unusually vivid fire
AvailabilityMost common shape worldwideRare — requires specialist cutting expertise
Cut grade assessmentIGI Excellent cut grade availableVisual assessment in video — no standardised cut grade for Portuguese
03

Portuguese cut settings

The Portuguese cut has a round outline — the same as a round brilliant. Any setting designed for round brilliants works for the Portuguese cut. The difference is entirely in what is inside the stone, not in its external geometry.

Recommended settings for Portuguese cut
  • Solitaire — the most effective setting for showcasing the exceptional fire. Nothing competes with or distracts from the stone's optical performance
  • Simple bezel — clean and contemporary. The bezel creates a minimal frame that keeps all attention on the stone's fire and light performance
  • Simple halo — a diamond halo around the Portuguese cut adds surrounding brilliance. The combination of the halo's sparkle and the Portuguese cut's exceptional fire creates maximum overall light effect
04

Portuguese cut questions

Is the Portuguese cut more expensive than a round brilliant?
The Portuguese cut typically carries a premium over a standard round brilliant of the same carat weight because the cutting is more labour-intensive. The additional facets require significantly more skill and time to produce correctly.
Will anyone notice the difference between Portuguese cut and round brilliant?
The optical performance is noticeably different — the fire (colour dispersion) is significantly more vivid in the Portuguese cut. A person familiar with fine diamonds will notice immediately. Most observers will simply see a very sparkly, very impressive diamond.
Is the Portuguese cut one of the 15 Fenora shapes?
Yes. The Portuguese cut is part of the Fenora 15-shape collection, available in IGI certified lab grown diamond.
Melbourne client care · Made in Surat

Choosing a Portuguese cut diamond? Ask Yash Chandpara.

Book a free online consultation. Yash Chandpara shows Portuguese cut and round brilliant side by side in controlled lighting — the fire difference is immediately visible.