Why Do I Need a Diamond Certificate?

If you recently purchased a diamond, you will likely receive a diamond certificate. This document - also called a "grading report" or "appraisal" - is issued by an independent gemological laboratory and provides detailed information about your stone.

While the certificate may look like nothing more than a piece of paper, it actually serves an essential purpose. Verifying the unique characteristics of your diamond, it provides an extra layer of confidence in your purchase.

What Goes Into Grading a Diamond?

To understand why a diamond certificate is important, it's helpful to know a little bit about the process of grading diamonds.

The main organizations that grade diamonds include:

  • International Gemological Appraisals (IGA)
  • Gemological Institute of America (GIA)
  • International Gemological Institute (IGI)
  • American Gem Society (AGS).

Each organization has its own set of standards, but generally, the grading process includes the 4 Cs of diamonds: carat weight, color, clarity, and cut.

1. Carat Weight

The weight of a diamond is measured in carats. One carat is equal to 0.2 grams, or 200 milligrams. The weight of a diamond has the biggest impact on its price per carat. The larger the diamond, the more rare and valuable it is.

2. Color

The color of a diamond is judged on a scale from D (no hue) to Z (a yellow-hued diamond). most diamonds used in jewelry fall somewhere in the D-J range. The less color a diamond has, the more rare and expensive it is.

3. Clarity

The clarity of a diamond is judged on a 6-point scale from IF (internally flawless) to I3 (included). Most diamonds used in jewelry fall somewhere in the VS2-SI2 range. The less included a diamond is, the more rare and expensive it is.

4. Cut

The cut of a diamond is judged on how well it reflects light. A well-cut diamond will sparkle and flash in the light, while a poorly cut diamond will appear dull. The cut of a diamond also affects its overall shape.

What Else Is Considered for a Diamond Certificate?

In addition to the 4 Cs, there are a few other factors that are considered when creating a diamond certificate.

1. Fluorescence

Fluorescence is the way a diamond reacts to ultraviolet light. Some diamonds will glow under UV light, while others will not. The fluorescence of a diamond can affect its overall appearance and is therefore taken into consideration when grading a diamond.

2. Measurements

The dimensions of a diamond are also noted on its certificate. This includes the length, width, and depth of the stone, as well as its diameter.

3. Proportions

The proportions of a diamond refer to the way the different parts of the stone are proportioned to each other. This includes the crown's height, the pavilion's depth, and the facets' angle.

4. Finish

The finish of a diamond refers to the overall quality of its cut and polish. This includes factors like symmetry, brightness, fire, and how well the different parts of the diamond are proportioned to each other.

5. Shape

The shape of a diamond is the final factor that is considered in its grading. The most common shapes are round, princess, emerald, marquise, oval, pear, heart, and cushion.

Why Is a Certificate Important?

It is critical that you always ask to see the certificate for any diamond you are considering purchasing. The certificate guarantees that the diamond you buy is exactly as it is described.

When looking at a certificate, there are a few things to keep in mind. First, make sure that the certificate is from a reputable source, such as the GIA or AGS.

Second, check the certificate number to make sure it matches the number on the diamond you are considering.

Finally, ensure that the certificate includes all the information you would expect, such as carat weight, color, clarity, cut, and dimensions.

If you are buying a diamond online, it is especially important to request a copy of the certificate before you make your purchase.

Don't Risk It — Get a Certificate

When you are buying a diamond, you are making a significant investment. Don't take chances — make sure you get a certificate from a reputable source to guarantee the quality of your diamond.

Your certificate will contain all of the information you need to know about your diamond, including its carat weight, color, clarity, and cut. 

With a certificate in hand, you can be confident that you are getting precisely what you are paying for.

A certificate may cost a little extra, but it is well worth the peace of mind it will provide. Keep your certificate in a safe place, and enjoy your beautiful diamond for years to come.