The 4 C's of Diamonds

To simplify diamond grading, the 4Cs refer to cut, color, clarity, and carat weight - a universal language developed in collaboration with the International Gemological Institute (IGI).

 

What Are the Four Cs of Diamonds?

Before purchasing a diamond, it is critical to understand how to ensure you are getting what you pay for. Understanding how the value of a diamond is determined will also help you make trade-offs. You might prefer a larger stone with less clarity or minor flaws over a flawless but much smaller stone.

 

These four diamond qualities are the most important factors influencing its beauty and structure. The combination of these factors determines a diamond’s relative rarity and value. Within the diamond, the 4Cs interact with one another. They determine how the diamond appears and its quality. For example, the ability of a diamond to reflect light to your eyes is determined primarily by cut quality but also by color and clarity.

 

Carat

The first of the four C’s that most people learn about is the carat weight, which is also the best indicator of a diamond’s size.

The weight of a diamond is measured in carats. The weight is rounded to two decimal places. One carat is equal to 0.2 grams. A half carat (0.50 carat) is thus equivalent to 0.10 grams. In contrast, 1 gram equals 5.00 carat. The greater the carat weight, the more unique the diamond and, as a result, the greater the price.

 

Clarity

The clarity of a diamond is determined by its inherent inclusions, typically tiny in size. According to expert analysts, the clarity of a diamond is determined by the defects associated with it. Contrary to popular belief, many specialists in diamond extraction and cutting agree that the clarity of such precious stones is strongly tied to the purity and rarity element associated with such assets.

When evaluating the clarity of a diamond, gemologists can be an excellent choice. A gemmologist thoroughly examines the product qualities and magnifies the product to note the clarity linked with the costly stone.

  • VVS1

  • Very Very Slightly Included 1

  • Usually just one tiny inclusion visible only to a trained eye under 10x magnification.

  • VVS-2

  • Very Slightly Very Included 2

  • Tiny inclusions visible only to a trained eye under 10x magnification.

  • VS-1

  • Very Slightly Included 1

  • Very small inclusions visible with 10x magnification.

  • VS-2

  • Very Slightly Included 2

  • Several very small inclusions visible with 10x magnification.

  • SI-1

  • Slightly Included 1

  • Small inclusions visible with 10x magnification.

  • SI-2

  • Slightly Included 2

  • Several small inclusions visible with 10x magnification.

  • I-1

  • Included 1

  • Flaws that are visible to the naked eye.

  • I-2

  • Included 2

  • Many flaws clearly visible to the naked eye that also decrease the brilliance.

  • I-3

  • Included 3

  • Many flaws clearly visible to the naked eye which decrease the brilliance and compromise the structure of the diamond, making it more easily cracked or chipped

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    Color

    Diamonds are found in every color of the rainbow. The finest colour for a diamond is none at all or something that cannot be seen. Most people, however, are preoccupied with diamonds that are white or clear in color.

    Light can easily flow through a colorless diamond, resulting in light dispersion as a rainbow’s hue. Colors range from entirely colorless to pale yellow. Differences between diamond grades are relatively subtle; therefore, grading is done under limited lighting, and color grading diamonds requires a skilled eye and many years of practice.

  • D

  • Absolutely Colorless

  • The highest color grade, which is extremely rare.

  • E

  • Colorless

  • Only Minute traces of color can be detected by an gemologist, A rare diamond.  

  • F

  • Colorless 

  • Slight color detected by an expert gemologist, but still considered a "colorless" grade. A high-quality diamond.

  • G-H

  •  Near-Colorless

  • Color noticeable when compared to diamonds of better grades, but these grade offer excellent value.

  • I

  • Near-Colorless

  • Color slightly detectable. An excellent value.

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    Cut

    The Diamond Cut Scale contains five grades ranging from Poor to Excellent. The cut grade of a diamond directly impacts its beauty; if a diamond is cut and polished correctly, it will have a much more desirable appearance, even when compared to diamonds of higher color and clarity grades.

     

    Light’s Effect on a Diamond

    There are many factors that affect the brilliance of a diamond, the most important of which is its ability to reflect light:

    Reflection

    When Light Enters The Surface Of A Diamond, A Portion Of The Light Reflects Immediately Back Out Of The Table (top).

    Reflection

    The Remaining Rays Of Light Travel Into The Center Of The Diamond And Bounce Off Its Internal Walls.

    Reflection

    As Light Exits The Diamond, Dispersion Causes The White Light To Be Separated Into Multiple Colors.

     

    Diamond Shapes