The Brilliant Edit

How Are Lab Grown Diamonds Graded?

If you’re in the market for jewelry featuring lab grown diamonds, it’s important to understand how these stones are graded. These diamonds vary in their characteristics, exhibiting a range of hues, clarity, shapes and sizes.

At Grown Brilliance, we carry only high-quality lab grown diamonds set in beautiful, customizable designs. Knowing what to look for when evaluating lab grown diamonds can help you find the perfect stone for your style and budget.

4Cs of Lab Grown Diamonds

The GIA International Diamond Grading System evaluates diamond quality based on four main characteristics, commonly called the 4Cs. Since lab grown diamonds are physically, optically and chemically identical to natural diamonds, they are graded based on the same 4C criteria: 


  • Cut. Rates a diamond’s cut and shape, which affect its symmetry, brightness, fire and how it interacts with light.
  • Color. Diamonds are assessed based on their lack of color. A perfect diamond has no hue and is considered to have a higher value.
  • Clarity. Measures the presence of blemishes and inclusions in and on the diamond. 
  • Carat weight. This is the measure of a diamond’s weight, with one carat being equivalent to 200 milligrams. 

When purchasing jewelry like lab grown diamond rings or lab grown diamond bracelets, the item will come with a grading report from a reputable gemological institute like the Gemological Institute of America (GIA) or International Gemological Institute (IGI). This document helps you understand the value of the stones in the diamond market and make the best choice for your next piece of jewelry. 

Cut: Grading a Lab Diamond’s Light Performance

Often regarded as the most crucial of the 4Cs, the cut has the biggest impact on a diamond’s brilliance and beauty. It doesn’t just refer to a diamond’s shape; it determines how effectively light is captured and refracted, resulting in the stone’s unmistakable sparkle.

Lab created diamonds are graded on a scale ranging from Ideal to Poor. The following offers a breakdown of the different cut grades:

Diamond Cut Grade

At Grown Brilliance, our lab stones have Excellent cut ratings or above. For instance, our Three Stone Ring and Hidden Halo Stud Earrings feature lab grown diamonds with exceptional fire and scintillation.  

Color: Rating Colorlessness in Lab Created Diamonds

Most jewelry seekers prioritize diamonds with minimal color. The diamond color grading system categorizes diamonds on a scale ranging from D (colorless) to Z (light). 

Clarity: Assessing the Flawlessness of Lab Grown Diamonds

Diamond clarity refers to the presence or absence of inclusions, tiny imperfections that form during the growth process. Fewer inclusions make a diamond more valuable and desired for jewelry. The diamond clarity grading system includes the following ratings:

Diamond Clarity Grade

For an exceptional display of brilliance without visible distractions, select a diamond with a higher clarity grade for your lab diamond jewelry. Our diamonds at Grown Brilliance are rated VS2 and above, meaning exclusions are invisible to the naked eye. For instance, our Round Lab Diamond Three Stone Set and 3-carat Flower Eternity Ring have VS2+ clarity ratings.

Carat: Measuring a Lab Diamond’s Size and Weight

Carat, measuring a diamond’s weight, directly influences its value, with one diamond carat equaling 200 milligrams. Carat indicates the diamond’s weight, not its size, but most larger diamonds have a higher carat weight. 

The most common diamond weights are between 0.25 and 5 carats, with an average lab grown diamond engagement ring being around one carat. When deciding on carat weight, consider the following: 

The lab grown diamond pieces at Grown Brilliance feature a range of carat weights, from delicate .5 carat lab grown stones to show-stopping 12-carat lab diamond bracelets. With our wide range of options, you have the freedom to choose your favorite design and modify the carat weight to align with your taste. This flexibility empowers you to achieve the desired aesthetic while fine-tuning the diamond’s size to accommodate your preferences and budget.

Discover the World of Lab Grown Diamonds at Grown Brilliance

At Grown Brilliance, our collection of ethically sourced, certified stones offers exceptional quality and value across all the 4Cs, allowing you to find the perfect piece to elevate your style.

From lab grown diamond tennis bracelets and engagement rings to necklaces, earrings and wedding bands, explore our stunning selection and experience the beauty and sparkle of lab grown diamonds with Grown Brilliance.

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