The 4 carat radiant cut is one of the most versatile and brilliantly legendary diamond choices available at a truly extraordinary size — combining an exceptional carat weight with the exceptional fire of a round brilliant in a bold rectangular or square shape that delivers maximum sparkle and a breathtaking geometric grandeur of legendary proportion at 4 carats. At Variation, explore our certified collection of 4 carat radiant cut lab grown diamonds, IGI certified, conflict-free, and priced up to 80% less than natural diamonds.
About 4 Carat Radiant Cut Lab Grown Diamonds
The 4 carat radiant cut lab grown diamond is one of the most versatile, brilliantly magnificent, and visually extraordinary diamond combinations available — pairing a truly exceptional and legendary carat weight with a unique rectangular or square shape that delivers the fire and brilliance of a round brilliant in a bold, geometric form of legendary proportion. At 4 carats, the radiant cut's exceptional brilliance and bold geometric presence reach an entirely new level of visual magnificence and legendary grandeur — its 70 precisely arranged facets delivering an extraordinary display of fire and scintillation of breathtaking proportion across a significantly larger surface area than at any smaller size. At Variation, our IGI certified 4 carat radiant cut lab grown diamonds are available in D to F color and VVS1 to VS2 clarity — priced up to 80% less than an equivalent natural diamond.
Why Choose a 4 Carat Radiant Cut Lab Grown Diamond?
At 4 carats, the radiant cut delivers a level of bold geometric brilliance and legendary visual magnificence that is truly breathtaking — its rectangular or square form and exceptional 70-facet arrangement creating an extraordinary display of fire and sparkle of legendary proportion across a significantly larger surface area than at any smaller size. The radiant cut's trimmed corners — its signature practical design feature — make it one of the most durable and secure fancy shape diamonds for everyday wear at 4 carats, while its exceptional brilliance makes it one of the most visually magnificent and legendarily commanding choices at this extraordinary and exceptional size. For buyers who want a 4 carat diamond that delivers the maximum brilliance of a round brilliant in a bold, versatile geometric form of legendary presence, the radiant cut is an outstanding and deeply compelling choice.
- 70 precisely arranged facets — delivering exceptional brilliance in a rectangular form at 4 carats
- Approximately 9.0 x 9.0mm face-up size — bold and breathtakingly commanding at 4 carats
- Trimmed corners — reducing chipping risk while adding geometric elegance at this legendary size
- IGI certified — every stone independently graded and verified
- D, E and F color — the three highest color grades available
- VVS1 to VS2 clarity — all eye-clean, all exceptional quality
- Up to 80% less than an equivalent natural 4 carat radiant cut diamond
How Big Is a 4 Carat Radiant Cut Lab Grown Diamond?
A 4 carat radiant cut diamond measures approximately 9.0 x 9.0mm face-up in its classic square form — or approximately 10.5 x 8.0mm in a classic rectangular form with a length-to-width ratio of 1.25. At this extraordinary and legendary size, the radiant cut's brilliant facet pattern and bold geometric outline create a dramatically commanding and legendarily magnificent presence that is significantly more impactful and visually extraordinary than at any smaller size.
For buyers seeking a larger face-up appearance at 4 carats, a rectangular radiant cut with a length-to-width ratio of 1.25–1.35 faces up considerably larger than a square radiant — delivering more visual presence and a more elongated, dramatically commanding silhouette of breathtaking proportion while retaining the radiant cut's signature brilliant fire and bold geometric grandeur at this legendary and exceptional carat weight.
How to Choose the Best 4 Carat Radiant Cut Lab Grown Diamond
Square vs Rectangular at 4 Carats
At 4 carats, the choice between square and rectangular proportions has a dramatically more significant and breathtaking visual impact than at any smaller size. A square radiant at 4 carats — with a length-to-width ratio of 1.00–1.05 — delivers a bold, commanding square presence of legendary geometric grandeur that is immediately and breathtakingly impressive at this extraordinary size. A rectangular radiant at 4 carats — with a ratio of 1.20–1.35 — faces up considerably larger and delivers a more elongated, dramatically commanding presence of breathtaking and legendary proportion that is particularly striking in ring and pendant settings at this exceptional size. Both are equally brilliant at 4 carats — the choice is personal preference for shape and legendary visual presence.
Symmetry Is Legendarily Non-Negotiable at 4 Carats
At 4 carats, symmetry is legendarily non-negotiable for a radiant cut diamond — and the impact of any symmetry deviation is dramatically more visible and damaging at this legendary size than at any smaller weight. Uneven sides or misaligned facets are immediately and clearly visible in this geometric shape at 4 carats — significantly detracting from the stone's legendary bold geometric grandeur and exceptional brilliance. Always choose Excellent or Very Good symmetry grades for a 4 carat radiant cut diamond and view the stone face-up in high-resolution video before purchasing to verify perfect geometric balance at this extraordinary size.
Color and Clarity at 4 Carats
At 4 carats, both color and clarity are critically more visible in a radiant cut than at any smaller size. Radiant cuts retain color more than round diamonds due to their deep pavilion — D color is strongly recommended for white gold or platinum settings at 4 carats. For clarity, VVS2 or higher is strongly recommended as inclusions become significantly more visible at this legendary size. The radiant cut's brilliant facet pattern continues to conceal inclusions exceptionally well at 4 carats — VVS2 eye-clean stones deliver the best balance of quality and legendary visual beauty. Always view in high-resolution video before purchasing to verify eye-cleanliness at this extraordinary size.
Why Buy 4 Carat Radiant Cut Lab Grown Diamonds from Variation?
At Variation, we specialize exclusively in lab grown diamonds — and our 4 carat radiant cut collection reflects our commitment to quality, ethics, and exceptional value at this legendary and extraordinary size.
- IGI certified — every stone comes with a full IGI grading report
- Square and rectangular options available — both radiant cut proportions in stock at 4 carats
- D, E and F color only — the highest color grades available
- VVS1 to VS2 clarity — all eye-clean, all exceptional quality
- Conflict-free & ethically sourced — always
- Priced up to 80% less than equivalent natural diamonds
Explore Other Sizes in Radiant Cut Lab Grown Diamonds
Not sure about 4 carats? Explore our radiant cut lab grown diamonds in other carat weights — all IGI certified, conflict-free, and priced up to 80% less than natural diamonds.
Explore Other Shapes in 4 Carat Lab Grown Diamonds
Not sure about radiant cut? Explore our 4 carat lab grown diamonds in other shapes — each with its own unique character, brilliance, and appeal.
- 4 Carat Round Cut
- 4 Carat Oval Cut
- 4 Carat Cushion Cut
- 4 Carat Emerald Cut
- 4 Carat Princess Cut
- 4 Carat Pear Cut
- 4 Carat Marquise Cut
- 4 Carat Heart Cut
- 4 Carat Portuguese Cut
- 4 Carat Ashoka Cut
- 4 Carat Trillion Cut
- 4 Carat Hexagon Cut
Frequently Asked Questions
How big is a 4 carat radiant cut lab grown diamond?
A 4 carat radiant cut diamond measures approximately 9.0 x 9.0mm face-up in square form or 10.5 x 8.0mm in classic rectangular form. A rectangular radiant with a length-to-width ratio of 1.25–1.35 faces up considerably larger — delivering more visual presence and a more elongated, dramatically commanding silhouette of breathtaking proportion at this extraordinary and legendary carat weight.
What is the difference between a 4 carat radiant cut and emerald cut lab grown diamond?
Both share a rectangular shape at 4 carats but are profoundly different in character and legendary visual impact. A 4 carat radiant cut is a brilliant cut with 70 facets that maximize sparkle and fire across the rectangular form at this legendary size — bold, dazzling, and magnificently commanding. A 4 carat emerald cut is a step cut with large open facets that reveal extraordinary depth and deliver a breathtaking hall of mirrors effect of legendary proportion — architecturally magnificent and deeply sophisticated. The radiant cut is the choice of legendary brilliance; the emerald cut is the choice of legendary architectural sophistication at this extraordinary size.
Is a 4 carat radiant cut lab grown diamond good for an engagement ring?
Yes — a 4 carat radiant cut engagement ring is a bold, brilliantly magnificent, and legendarily extraordinary choice at this exceptional size. Its exceptional brilliance, bold geometric grandeur of legendary proportion, trimmed corners — making it one of the most durable fancy shape diamonds at this legendary size — and commanding presence make it an outstanding and deeply impressive choice. At up to 80% less than a natural diamond of the same quality, a 4 carat IGI certified lab grown radiant cut offers extraordinary value.
What is the difference between a 4 carat radiant cut and princess cut lab grown diamond?
Both are brilliant cut square diamonds at 4 carats delivering exceptional brilliance but they differ in one critically important practical way. A princess cut has sharp, uncut corners — bolder and more modern in appearance but significantly more vulnerable to chipping at this legendary size. A radiant cut has trimmed corners — providing significantly better protection against chipping and making it the more practical and secure choice for everyday wear at 4 carats. At this extraordinary size, the radiant cut's trimmed corners represent a meaningful practical advantage that should not be overlooked.
What color and clarity should I choose for a 4 carat radiant cut lab grown diamond?
At 4 carats, D color is strongly recommended for white gold or platinum settings as color becomes critically more visible in the deeper pavilion at this legendary size. VVS2 clarity or higher is strongly recommended as inclusions become significantly more visible than at smaller sizes. For yellow or rose gold settings, E color delivers an outstanding result. All diamonds at Variation are available in D, E and F color grades and our experts can guide you to the finest quality at 4 carats.
Explore our full collection of 4 carat radiant cut lab grown diamonds above and find the stone that speaks to you. Questions? Our diamond experts are here to help.