4C’s of Diamonds – Simplified

by Vitrag Mehta
diamond ring by VVS Jewelry Store
Every diamond is unique in their own way as every one of them have specific properties of their own. We should know about the factors which plays role to determine Diamonds brilliance, sparkle and fire. There are four main factors which are known by 4 C’s of diamond, let’s get to know about that.

Note: A polished Diamond has many different shapes, but, in this article we are sharing the knowledge as per Round Brilliant Shape diamonds, which is widely and mostly used all over the world.

Which are the 4C’s which define diamonds quality and brilliance?

  1. CUT
  2. COLOR
  4. CARAT (Weight)

Now that you know names of 4C’s of diamond, let’s get to know each of them in brief, which can result in healthy purchase of diamonds for everyone. Don’t forget to checkout diamond pricing insights as per diamond perameters whil you’ll find at the end of this article.  

1. CUT

          It is primary and very essential criteria of diamond, cut speaks the proportion of facets of diamond in the way diamond is brutted. Cut is defined by various proprties of facets in diamond like Table %, Total Depth %, Crown Height & Angle, Pavalion Height & Angle and more (check all properties of cut in the image below). The basic idea to give cut grades is to simplify understanding a diamond’s brilliance. When all the properties of facets made perfectly, The Fire and Luster looks so amazing and beautiful. Let’s have a look at what type of Cut grades are given to diamonds by GIA (Gemological Institute of America) which is one of the best labs across the world in certifying diamonds, and, which grade is best and which one is worst.

Different Cut Grades of a Round Brilliant Diamond

  1. Ideal / Excellent (The Best) 
  2. Very Good
  3. Good
  4. Fair
  5. Poor (The Weakest)
Image Souce : GIA (Gemological Institute of America)
Image Source : GIA (Gemological Institute of America)


          Every diamond is categorized in different colour grades according to how white or coloured a diamond is. There are mostly all color of diamonds come out from mines i.e White, Yellow, Green, Brown, Red, Purple & more, but, the main color in general use is WHITE. The white color also has different grades to define it’s exact brilliance and quality which is classified in 23 colour grades from D-Z in alphabetical order where D being the most colourless and Z being most coloured diamond. In other words D is the most white diamond with more value and Z is offcourse coloured one with yellowish or brownish tint, which has lesser value. Check some examples below, how a D, H, N & Z color looks like.

“A chemically pure and structurally perfect diamond has no hue, like a drop of pure water, and consequently, a higher value. ” according to GIA. 

          But, the variations of color are not easily identifiable for an untrained eye , for most people these colour differences are so subtle but it has a very big impact on the value of diamond. Only certified graders can see the depth of colour or colourlessness in a diamond. Hence, it’s better to buy any diamonds or diamond jewelry with certificate of known gem labs.

Move the scale to check colors of a Diamond

Courtesey of GIA ®

3. Clarity

          Clarity or Purity means pureness of a diamond from internal inclusions, it evaluates how pure the diamond is. Do you know that a rough diamond comes with many imperfections/inclusions in it? Only rare diamonds comes with fully pureness which has no imperfactions.

Pure Rough Diamond - No inclusions
Rough Diamond with inclusions

          Diamonds are created when tremendous heat and ectreme pressure creates on exposed carbon deep in the earth. This process relates in different type of internal and external incusions in the diamond. Simply, the more inclusion a diamond have, the lest fire and value it creates. Pure diamonds are highly expensive in priice and rarely found. So, what are the grades given to a diamond to evaluate it’s clarity? and what clarity of diamond one should buy? check below.

Diamond Clarity Grades

Which are the clarity grades of polished diamonds given by GIA?

  1. FL – Flawlwss
  2. IF – Internally Flawless
  3. VVS1 – Very Very Slightly included 1
  4. VVS2 – Vet Very Slightly Included 2
  5. VS1 – Very Slightly Included 1
  6. VS2 – Very Slightly Included 2
  7. SI1 – Slightly Included 1
  8. SI2 – Slightly Included 2
  9. I1, I2, I3 – Included

          You can see different grades that evaluates diamond clarity where FL & IF are pure diamonds without imperfections and Included (I1, I2, I3) have many imperfections and inclusions. It’s obvious that FL is way more costlier than Included clarity. So, which one should you buy? Well, the question totally depends on buyer behaviour and budget. But, answering generally, many people go for VS or SI clarity as it dont it’s inclusions are not easily visible by normal eye and yes, it comes in budget prices too. However, there are some regions, countries where people buy flawless or VVS clarity because they do not want to compromise anything and have bigger budgets. 

Example of polished diamonds with different clatity graded stones (markers indicates inclusions/imperfections in the diamond)

4. CARAT (Weight)

          How do we measure weight of a diamond? CARAT. 1 Carat equals to 200miligrams or 0.20gms, and so 5carat of diamonds weights as little as 1gram. Each carat weight counts as per hundredth decimal to precisely know it’s exact value. 

Move the scale to check weight and visual size of a Diamond

Courtesey of GIA ®

          Weight of a diamonds and it’s measurements (i.e Lenth, Width and Height) relates to each other and, there is a rule of  how much lenth or width should be in a perticular carat weight, to give maximum brilliance to a diamond. And, it directly refects to CUT grade of a diamond too. For example, a 1.00 carat diamond’s potential lenth should be between 6.30-6.50mm to give it maximum sparkle. If it’s so, the cut grade can be excellent, but suppose the lenth is 6.20mm only, the CUT grade can not be “EXCELLENT” evenif all other parameters are perfect. Beloe, we have attached an image to check the relation of diamond weight and it’s measurements.

          We have shared this article with the best of our knowledge and as per GIA standards, GIA(Gemological Institute of America) is one of the best and largest gemological labs in the world and it’s certificates for Diamond gives maximum value. We at, VVS Jewelry Store manufactures natural diamonds from 0.01carat to 5carat sizes, in various shapes, color, clarity and cut. Also manufactures Fine Diamond Jewelry which we sells with complete authenticity guarantee – certified by world known labs like GIA / IGI / HRD / SGL. You can always visit our store to buy anytype of certified diamond jewelry | vvsjewelrystore.com Or call/whatsapp at +91 90992 39470 | Email: [email protected]

You may also like

1 comment

Nick G May 12, 2020 - 5:43 am

Nice content. Thanks for sharing knowledge on diammonds


Leave a Comment