Diamond’s Certificate or 5th C: Importance of buying a certified diamond

Certification Or The 5th C:

Of late ‘Certification of diamond’ has become an inseparable part of the diamond industry. That’s why Certification is called the 5th C. A certified diamond is reliable and acceptable across the globe than a diamond which is not certified.

In this blog you will know:

  • What is certification and why you should buy a certified diamond?
  • Why should you buy a certified diamond from GIA or AGS and not from others?
  • What is ‘Inscription number’ in the diamond and why it is important?

Certification is the physical and optical analysis of the diamond in the lab. In the lab, a diamond goes through the various process of stringent scrutiny. From its originality to its quality of Color, Clarity, Cut and Carat (4Cs’) all are tested by experts. Fluorescence and “Light Performance report” by Ideal-scope or ASET-scope are done by advanced technologies.

Certification: Mental peace for a newbie

So when you buy a certified diamond you know what you are paying for. You are assured of its quality, durability and its resell value. This is not the case of a non-certified diamond.

Because, you never know what are you buying, a low-quality diamond, a treated one, a synthetic, a Moissanite, a fake one or a glass. You are on your own. Certification takes care of all these things. You can relax after buying a certified diamond.

There are many labs in the world that are doing the certification job. They are GIA (Gemological Institute of America), AGS (American Gem Society), EGL (European Gemological Laboratory), IGI (International Gemological Institute). Beside these labs, there are numerous local institutions doing certification in their respected countries or localities.

The most reputed and trusted among all the Labs are GIA and AGS. Let’s know why they are at the top and preferable.

Why GIA or AGS Certificate?

When it comes to trust, reliability, international credibility and acceptance no one comes close to GIA. Over the years GIA has been maintaining its superiority over others for its stringent norms and consistency in grading.

It follows the strict standard in grading colors and clarity. Present internationally accepted Color grading system “D to Z” and the Clarity grade evaluation “Flawless to I3” are the invention of GIA.

This is the most significant contribution of GIA to the diamond industry and to the billions of diamond lovers all over the world. When it comes to cut they judge a diamond by its look, fire, and brilliance.

AGS Certificate:

Next to GIA is AGS which is known for its stricter standardization in Cut grade. It is a non-profit laboratory doing service in the field of diamond grading since 1996. It grades the 4 C’s of diamond from 0 to 10. 0 being the best quality, while 10 being the lowest in the quality chart.

Introduction of ASET System:

In 2005 it introduced AGS ASET (Angular Spectrum Evaluation Tool) system to evaluate diamond’s cut with focus on diamond’s light performance. It is by far the most advanced and scientific method to judge a diamonds brilliance, fire and sparkle. In the “Cut chapter” I have explained it in detail.

The following image is a copy of the certificate from GIA & AGS Lab.

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Why you should not buy a diamond from other labs?

EGL, IGI labs are not at par with GIA and AGS. There are serious issues and inconsistencies in their grading reports. There are many instances where an IGI or EGL certified diamonds are found to be much lower in quality in comparison to the same certified by GIA or AGS.

Because of their (IGI & EGL) erroneous and inconsistent grading, they have low credibility in the industry. So for a customer like you, there is a high risk of buying a low-quality diamond at a high price in an EGL or IGI certified diamond.

Inconsistency & Inflated grading:

For example, a VS1, G color certified diamond from IGI or EGL may be of VS2 and I color by GIA or AGS. So be careful. Only prefer a GIA or AGS certified diamond which is more reliable and has resell value across the counter.

GIA and AGS certified diamonds are available in all reputed jewelry stores across the globe. So avoid buying a certified diamond from the above labs or from the little-known local labs.

What is Inscription Number? Why is it so important?

Inscription number is a unique identification number given to a diamond at the time of grading by the grading Lab. It is inscribed by laser on the girdle of a diamond (See image).

It is like a barcode that differentiates each product from other. It says everything about the diamond from its quality to its origin. It is very important that you should double check and match the number on the certificate with the number on the diamond.

It is easy to find a lost diamond by its inscription number. You can also check your diamond’s authenticity by visiting the Lab’s official website. GIA & AGS have this facility to check your diamond by putting the inscription number on its website.

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(Image source)

I am giving you an example why it is important to check the Inscription Number at the time of buying a diamond. In a jewelry shop, there are many diamonds of similar weight and color.

Suppose willingly or by mistake the person at the jewelry store gives you a diamond of similar weight and color but of a low Clarity. Then how would you know that this is your diamond?

Here the inscription number is the only way to know about its weight, color, and Clarity. So keep this thing in mind. It is important that you double check the inscription number with the jeweler and match the number in the certificate with the number on the girdle of the diamond. Apply the same rule for online buying too after you receive your diamond.

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