How does diamond grading work?

There is no gemstone in the world quite like a diamond. Forged by nature, the average diamond is 3.3 billion years old. A diamond is a testament of endurance and strength. And not surprisingly, the ultimate symbol of love. If you want to know more about the history of diamonds please read this article.

If you’re shopping for a diamond, chances are, you’re celebrating an exciting and emotionally charged moment in your life.

What questions do I need to ask?

As you sit down with your favorite trusted jeweler, you probably have a lot of questions and concerns like, how can I be sure that what I’m purchasing is a real natural diamond? How do I know if the diamond has been treated? You may also wonder about the methods used to assign value to these unique and beautiful stones. You know you want to buy a piece that speaks to your heart, but you also want to make a smart purchase. So where do you begin?

The key to understanding diamonds is to understand the four attributes that all diamonds have in common. These four attributes: color, clarity, cut, and carat weight, are known as the Four C’s. The Gemological Institute of America, or GIA, developed the Four C’s to create a universal language when it came to the difficult task of determining diamond quality.

What and who is GIA?

Established in 1931, non-profit GIA is the largest and most respected institute of gemological research and learning in the world. GIA confers the jewelry industry’s highest professional diploma, the Graduate Gemologist diploma. And GIA maintains the world’s most advanced research laboratory for the scientific study of gemstones.

GIA created not only the Four C’s, but also the International Diamond Grading System. The grading standard used worldwide. And today, GIA is the keeper of the standard to protect all consumers of gemstones.

Diamonds of all shapes and sizes come to GIA from every corner of the globe for analysis and grading, including the world’s most famous diamonds like the Smithsonian’s Blue Hope diamond, and the De Beers’ Millennium Star.

Let’s select a diamond and see how it rates for color, clarity, cut, and carat weight, by taking it through some of the steps in the GIA grading process.

Let us grade a diamond!

At the GIA laboratory, scientific precision rules. Expert gemologists examine each diamond under tightly controlled lighting and viewing conditions. The goal is to provide the most rigorous assessment of a diamond’s Four C’s. To be sure that our diamond is graded in the most consistent and objective manner possible, our diamond will travel through the laboratory housed in a nondescript plastic cassette like all other diamonds.

We have chosen a diamond that looks good at first glance but not like worldclass good:

1.0 carat diamondIt is a diamond of one of our customers who wanted to get a new diamond ring.

She wanted to check her old diamond for quality because she suspected that her diamond did not have the advertised quality due to being graded by a low quality diamond grading lab.

While we don’t want to name the grading lab of our dear customer we only recommend buying diamonds graded by GIA or AGS.

Why are GIA and AGS the best?

Basically, it all just comes down to reliability.

Having worked as a professional AGS diamond appraiser for five years I do now what it is like to be confronted with diamonds day in and day out!

I know all the insides of the diamond grading industry and I know that many companies only take diamonds seriously that have grading report by AGS or GIA.

Experience has shown over and over again that only these two grading labs are really reliable in their grading practices.

Whereas other diamond grading labs give much better grades especially in diamond color GIA and AGS are usually quite strict with the color so that you really get what is written on the grading report.

If you have any more questions about all these issues please contact us here!