Understanding the 4Cs: Diamond Clarity
Diamond Clarity: What It Means and Why It Matters
Whether formed deep within the earth or created in a laboratory, almost every diamond contains tiny natural characteristics that tell the story of its formation. These internal and external features, known as inclusions and blemishes, determine a diamond's clarity grade. While many are microscopic and invisible to the naked eye, clarity remains an important factor in a diamond's overall quality and value.
Understanding diamond clarity helps you make a more informed choice, allowing you to balance purity, appearance and value when selecting the perfect diamond.
What Is Diamond Clarity?
Diamond clarity refers to the presence of natural internal characteristics, known as inclusions, and external surface characteristics, known as blemishes. These features form during a diamond's growth or occur during the cutting and polishing process, making every diamond completely unique.
Inclusions can include tiny crystals, feathers or clouds, while blemishes may consist of small scratches, polish lines or minor surface marks. Most are microscopic and cannot be seen without magnification.
When assessing clarity, gemologists consider the size, type, position and visibility of these characteristics, as well as their overall impact on the diamond's appearance.
How Is Diamond Clarity Graded?
Diamond clarity is assessed using the internationally recognised grading scale developed by the Gemological Institute of America (GIA). Every diamond is examined under 10x magnification before receiving one of the following clarity grades.
Flawless (FL)
No internal inclusions or external blemishes are visible under 10x magnification. These diamonds are exceptionally rare.
Internally Flawless (IF)
No internal inclusions are present, with only very minor surface blemishes visible under magnification.
Very Very Slightly Included (VVS1 & VVS2)
Minute inclusions that are extremely difficult for a trained grader to detect under 10x magnification.
Very Slightly Included (VS1 & VS2)
Minor inclusions that are difficult to detect under magnification and are typically invisible to the naked eye.
Slightly Included (SI1 & SI2)
Noticeable inclusions visible under magnification and, in some cases, to the unaided eye.
Included (I1, I2 & I3)
Obvious inclusions that may be visible without magnification and can affect both appearance and durability.
At True Brilliance, we carefully select diamonds within the VS+ clarity range, ensuring every diamond displays a beautifully clean appearance while meeting our exacting quality standards.
Inclusions vs Blemishes: What's the Difference?
Although both influence clarity, inclusions and blemishes describe different types of natural characteristics.
Inclusions are internal features, such as tiny crystals, feathers or clouds, formed as the diamond develops.
Blemishes are external surface characteristics, including polish lines, scratches or small chips, that generally occur during cutting, polishing or wear.
While both are considered during grading, internal inclusions typically have the greatest influence on a diamond's clarity grade.
Why Diamond Clarity Matters
Clarity influences the overall appearance and rarity of a diamond. Fewer visible inclusions create a cleaner-looking stone, particularly in larger diamonds or cuts with broad, open facets.
However, the highest clarity grade is not always necessary. Many diamonds with VS clarity appear completely clean to the naked eye, offering an excellent balance between beauty and value without paying a premium for characteristics that cannot be seen in everyday wear.
Lab-Grown Diamonds and Clarity
Lab-grown diamonds are assessed using exactly the same clarity grading standards as natural diamonds. Their origin has no bearing on how clarity is evaluated, with every diamond examined under the same internationally recognised grading criteria.
Because of the carefully controlled growth process, lab-grown diamonds often contain fewer inclusions than their natural counterparts, making high-clarity diamonds more readily available.
At True Brilliance, every lab-grown diamond is carefully selected to ensure it meets our strict quality standards for clarity and overall appearance.
When Should You Prioritise Clarity?
While clarity should always be considered alongside cut, colour and carat, there are certain situations where it becomes particularly important.
Emerald and Asscher Cuts
These step-cut diamonds feature large, open facets that make inclusions easier to see, making higher clarity grades a popular choice.
Larger Diamonds
As a diamond increases in size, inclusions can become more noticeable, making clarity increasingly important for larger centre stones.
Solitaire Settings
With nothing to distract from the centre diamond, solitaire rings naturally draw attention to the stone itself, making a clean appearance more desirable.
For many buyers, VS1 or VS2 diamonds provide the ideal balance of beauty, purity and value, appearing eye-clean while avoiding the premium associated with higher clarity grades.
Final Thoughts on Diamond Clarity
Diamond clarity is one of the four characteristics used to assess a diamond's quality, but it should always be considered alongside cut, colour and carat. Understanding how clarity is graded allows you to choose a diamond that looks exceptional without paying for differences that may only be visible under magnification.
At True Brilliance, we carefully select diamonds within the VS+ clarity range, ensuring every stone displays exceptional purity, beauty and lasting elegance.