Lab-grown diamonds round

The round brilliant cut diamond is the most popular in the world for a simple reason: it maximizes light. With its 57 or 58 precisely and symmetrically distributed facets, this cut transforms every ray of light into flashes of fire and brilliance that no other cut can match. At Diamante de Laboratorio, we work exclusively with round diamonds created in controlled environments, possessing the same physical, chemical, and optical properties as an earth-mined diamond, but with a responsible origin and a significantly more accessible price.

The round brilliant cut was developed and perfected throughout the 20th century by gemologists and mathematicians who studied how light interacts with diamonds. The result is a geometry that, when well-executed, returns almost all incoming light, minimizing losses through the sides or base. That's why it dominates the market: no other cut produces more brilliance per carat.

Why choose a laboratory-grown round diamond

Laboratory-grown diamonds are not imitations or simulations. They are real diamonds, with the same crystallized carbon composition and the same hardness (10 on the Mohs scale) as natural diamonds. The only difference is their origin: instead of forming under the earth's crust over billions of years, they grow in high-tech reactors in a matter of weeks.

Choosing a laboratory-grown round diamond over a natural one has clear advantages. First, price: for the same budget, you can access a considerably larger or higher quality diamond. Second, traceability: each stone is certified by international laboratories like IGI, which independently document its characteristics. And third, sustainability: the process does not involve mining, does not impact natural ecosystems, and has a significantly smaller carbon footprint when produced with renewable energy.

How the round brilliant cut is created in a laboratory

The process begins with the creation of the rough diamond. At Diamante de Laboratorio, we work with diamonds produced using two technologies: CVD (Chemical Vapor Deposition), which deposits layers of carbon onto a diamond seed in a vacuum chamber with high-temperature gases, and HPHT (High Pressure High Temperature), which replicates the pressure and temperature conditions inside the Earth.

Once the rough stone is obtained, cutters analyze it to determine the best possible use. In the case of the round cut, the geometry is very demanding: each facet must be placed with a precision of tenths of a degree for the result to be a brilliant that returns light correctly. A poorly executed cut—too deep or too shallow—causes light to escape through the sides or the base, drastically reducing the stone's brilliance. That's why the cut section in IGI certificates is one of the most relevant.

The 4Cs of the laboratory-grown round diamond

Cut

In the round brilliant cut, the cut is the most determining factor of the visual result. IGI classifies cut into five grades: Excellent, Very Good, Good, Fair, and Poor. For a round diamond, we recommend not going below Very Good, and if the budget allows, opting for Excellent. The difference in brilliance between an Excellent cut and a Good cut is noticeable to the naked eye. Attention should also be paid to polish and symmetry, which the certificate evaluates separately and which influence how light interacts with each facet.

Color

Diamond color is measured on a scale from D (colorless) to Z (visible yellow or brown). For a round brilliant mounted in gold or platinum, the D-E range guarantees a completely colorless appearance. Laboratory-grown diamonds tend to be produced with higher colors naturally, making them especially competitive in the premium ranges.

Clarity

Clarity describes the internal inclusions and external blemishes of the diamond. The scale ranges from FL (flawless) to I3 (inclusions visible to the naked eye). For everyday jewelry wear, a diamond with VVS1 or VVS2 clarity is virtually perfect to the naked eye, even if it's not under 10x magnification.

Carat

Carat measures the weight of the diamond, not its physical size, although both are related. A 1-carat round diamond is approximately 6.5 mm in diameter. The most demanded weights for engagement rings are between 1.5 and 5 carats. With a laboratory-grown diamond, you can access larger stones for the same budget as in the natural diamond market, allowing you to choose a size that was previously inaccessible.

IGI certification for laboratory-grown round diamonds

All laboratory-grown round diamonds in our collection are certified by the IGI (International Gemological Institute), one of the most recognized gemological laboratories in the world and a benchmark in the certification of laboratory-grown diamonds. The IGI certificate documents the 4Cs of each stone, its origin (laboratory), the creation method (CVD or HPHT), optical properties, and fluorescence grade.

This document is essential for several reasons: it guarantees that what you buy is exactly as described, facilitates comparison between stones, and provides objective support in case of resale or appraisal. Each certificate includes a reference number that allows its authenticity to be verified directly on the IGI website. At Diamante de Laboratorio, we do not sell uncertified diamonds.

How to choose your laboratory-grown round diamond

To choose wisely, the first step is to define what matters most: absolute brilliance, visible size, tight budget, or a combination of everything. For round diamonds, the cut is non-negotiable—don't go below Excellent—because it's the factor that most impacts the visual result. From there, adjust the color and clarity according to the setting you plan to use.

Our team can help you select the right stone according to your budget and the design of the piece you want to create.