Lab-grown radiant diamonds
Discover our collection of certified lab-grown radiant diamonds. Rectangular cut with cropped corners forming an octagon, maximum brilliance, and guaranteed ethical origin.
What is a lab-grown radiant diamond
The radiant diamond is a cut that combines the rectangular elegance of the emerald cut with the explosive brilliance of the round brilliant cut.
Its 70 facets, arranged in a unique radial pattern, maximize light dispersion and create an intense, uniform sparkle that few cuts can match.
Created in a laboratory using CVD or HPHT processes, the radiant diamond available at Lab Diamond precisely replicates the crystalline structure of a natural diamond, maintaining the same optical, physical, and chemical properties.
The only difference is the origin: no mining, no conflicts, and no unnecessary environmental impact.
Why choose a lab-grown radiant diamond
Lab-grown radiant diamonds offer a value proposition that is hard to beat: the same brilliance, the same hardness, and the same durability as a natural diamond, but at a significantly more accessible price.
This allows access to larger or higher quality stones while keeping the budget under control.
In addition, each stone includes a specific IGI certificate for lab diamonds, accrediting its characteristics and origin.
The radiant cut, thanks to its cut corners, is also more resistant to impacts than other rectangular cuts, making it an ideal choice for everyday jewelry.
How the radiant cut is created
The radiant cutting process requires high technical precision.
The lapidary works from a laboratory-grown crystal and cuts 70 facets following exact angles that determine how light enters, reflects, and exits the diamond.
The beveled corners are not just an aesthetic element: they help reduce stress points and make the stone more secure within the setting.
The final result combines the visual depth of step cuts with the characteristic fire of brilliant cuts.
The 4Cs of the radiant diamond
To correctly choose a radiant diamond, it is important to understand how the 4Cs affect this type of cut.
Color
The radiant cut tends to retain more color than a round brilliant.
If you are looking for a visually white stone, we recommend colors between D and E.
Clarity
Thanks to its numerous facets, the radiant cut is more forgiving of inclusions than step cuts.
A clarity of VS2 or higher usually offers an eye-clean result.
For large stones, especially those over 3 ct, we recommend not going below VVS2.
Cut
The IGI evaluates the radiant cut using a scale from Excellent to Poor.
Excellent or Very Good ratings guarantee maximum internal reflection and the characteristic brilliance of this cut.
At Lab Diamond, we work exclusively with cuts of Very Good or higher.
Carat
The radiant cut offers an excellent relationship between carat weight and visual size.
Thanks to its elongated shape, it usually appears larger than a round diamond of the same weight.
This makes it one of the most efficient cuts for those looking to maximize the apparent size of the stone.
IGI certification for lab-grown radiant diamonds
All lab-grown radiant diamonds in our collection are certified by the IGI (International Gemological Institute), the world's leading laboratory for lab-grown diamonds.
The certificate accredits the color, clarity, cut, and exact weight of each stone, in addition to confirming its laboratory origin through advanced gemological analysis techniques.
This ensures that the diamond received corresponds exactly to the described characteristics.
How to choose your lab-grown radiant diamond
Before choosing your radiant diamond, it is important to consider the length-to-width ratio.
- Ratios between 1.15 and 1.20: offer a more square and compact look.
- Ratios between 1.25 and 1.50: create a more elongated effect and visually slenderize the finger.
- For engagement rings: ratios between 1.30 and 1.45 are the most in demand.
It is also advisable to define the budget according to the desired carat weight.
With a lab-grown radiant diamond, it is possible to access sizes that would be out of reach for many budgets with natural diamonds.
If you have any doubts, our team can advise you to find the right stone according to your design, budget, and aesthetic preferences.
FAQs About Lab Grown Radiant Diamonds
Yes. The chemical composition (pure carbon in a cubic crystal structure), optical properties, and hardness are identical. The only difference is the origin: laboratory instead of mine.
A standard radiant cut diamond has 70 facets, distributed between the crown and pavilion. This number of facets is what gives it its characteristic brilliance, superior to that of other rectangular cuts.
Yes, it is one of the most popular cuts for this type of jewelry. Its trimmed corners make it more durable than other angular cuts, and its brilliance is very striking in a solitaire.
It depends on personal preference. Square radiants (1.15–1.20) offer a more classic look. Rectangular ones (1.25–1.50) make the finger appear more slender. The most popular ratio for engagement rings is between 1.30 and 1.45.
Between D and E for a visually white appearance. The radiant cut retains more color than the round brilliant, so going below F may be more noticeable than in other cuts.
Like all diamonds, the resale value is lower than the purchase price. However, its lower entry price allows you to access a higher-quality or larger stone from the outset.
