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How To Know If A Diamond Is Certified And Genuine

How To Know If A Diamond Is Certified And Genuine - GeumJewels

Diamonds are one of the most valuable and sought-after gemstones in the world. They are widely used in jewelry, especially engagement rings. However, with the increasing demand for diamonds and certified fine jewelry, it has become increasingly difficult to know if the diamond you are buying is genuine and of high quality. In this blog, we will guide you on how to know if a diamond is certified and genuine.

What is a Certified Diamond?

A certified diamond is a diamond that has been evaluated by a recognized diamond grading laboratory, such as the Gemological Institute of America (GIA), the American Gem Society (AGS), and the International Gemological Institute (IGI). These organizations are known for their strict and standardized grading procedures, which ensure that the diamond's quality and authenticity are accurately determined. Therefore, always opt for IGI,GIA or AGS Certified jewelry.

Why is it Important to Buy a Certified Diamond?

When you buy a certified diamond, you can be assured that the diamond is of high quality and is genuine. The certification provides a detailed report on the diamond's carat weight, cut, clarity, color, and other important characteristics. This information helps you make an informed decision when buying a 14kt diamond stud earrings, diamond nose pins, diamond rings, diamond necklaces, diamond bracelets, diamond bangles, diamond pendant, and diamond danglers and also adds to the resale value of the diamond.

How to Know if a Diamond is Certified?

How to Know if a Diamond is Certified?

Here are a few ways to know if a diamond is certified:

Ask the Seller:

The first and most straightforward way to know if a diamond is certified is to ask the seller. Reputable jewelry stores and online retailers will be happy to provide you with the diamond's certification.

Look for the Certification Number:

Most certified diamonds will have a unique certification number engraved on the girdle of the diamond. The girdle is the outer edge of the diamond, which separates the crown from the pavilion. You can check the certification number against the grading laboratory's database to confirm the authenticity of the diamond.

Check the Grading Report:

Diamond Grading Report

A diamond grading report is a detailed report on the diamond's characteristics, including its cut, clarity, color, and carat weight. The report is usually accompanied by a plot, which shows the diamond's inclusions and blemishes. When buying a diamond and other handmade gemstone rings, make sure you receive the grading report from the seller and check it for any discrepancies.

Tips for Identifying a Genuine Diamond

Tips for Identifying a Genuine Diamond

In addition to verifying the certification report, there are several tips that can help you identify a genuine diamond:

Know the 4 C’s:

Before you buy a diamond, it’s essential to understand the 4 C’s. Knowing the 4 C’s will help you evaluate the diamond’s quality and authenticity. They are:

  • Carat weight: refers to the size or weight of a diamond. One carat is equal to 0.2 grams.
  • Cut: refers to the symmetry, proportioning, and polish of a diamond. A well-cut diamond will reflect light brilliantly and create a beautiful sparkle.
  • Color: refers to the presence of any hue or tint in a diamond, with the highest-quality diamonds being completely colorless.
  • Clarity: refers to the presence of any internal or external imperfections or blemishes in a diamond. The fewer imperfections, the higher the clarity and value of the diamond.

Use a Jeweler’s Loupe:

A jeweler’s loupe is a magnifying glass that can be used to examine the diamond’s cut, clarity, and other features. It can also be used to identify any inclusions or blemishes that might indicate a fake diamond.

Check the Diamond’s Weight:

The weight of a diamond can indicate if it is genuine or not. A diamond should have a uniform weight, and if it feels light, it could be a fake stone.

Certification Code Engraved on Solitaires Edges:

In the jewelry industry, it is common for certified diamonds to have a certification number or code engraved on the girdle (the outer edge) of the diamond. This code serves as a means of identification and can be used to verify the diamond's authenticity, quality, and grading. The code engraved on the diamond's girdle is an important security feature that helps ensure that a certified diamond is not substituted or altered in any way.

What are the Risks of Buying an Uncertified Diamond?

Buying an uncertified diamond comes with several risks, including:

  • Quality: Uncertified diamonds may not be of high quality, and you may end up paying a high price for a diamond that is not worth the money.
  • Authenticity: Uncertified diamonds may not be genuine, and you may end up with a diamond that is not what it claims to be.
  • Resale Value: Uncertified diamonds may not have a resale value and may not fetch a good price when you sell them.
  • May Be Treated Or Processed: Uncertified diamonds may have been treated or processed in some way to enhance their appearance, such as being clarity-enhanced, laser-drilled, or treated with high pressure and high temperature (HPHT). These treatments can significantly impact the diamond's value and durability.


In conclusion, it is essential to know if a diamond is certified before making a purchase. Certified fine jewelry and diamonds provide a guarantee of quality and authenticity, and they also have a higher resale value. By following the tips provided in this blog, you can ensure that you are buying a certified and genuine diamond. So next time you go diamond shopping, remember to ask for the certification and make an informed decision. For more info, visit us at Geum Jewels!