What Are GIA Certified Diamonds?

When shopping, it is important to understand the quality and value of whatever you are buying. Not only is being knowledgable about the product useful, it also helps ensure you are getting a legitimate item. When it comes to buying diamonds, there are many different ways to determine the quality of the diamond itself. One way to guarantee you are getting a quality diamond is buying certified diamonds. However, diamond certification itself ranges in quality. While there are many respectable diamond certification labs, GIA has the most stringent standards. This ensures that GIA certified diamonds are of the highest possible quality and value.

What Is The GIA?

The Gemological Institute of America, better known as GIA, was founded in 1931. The mission of the organization is to ensure the highest quality standards are used in evaluating gemstones, including diamonds. This helps protect both consumers and sellers. In addition to setting diamond grading standards, the GIA also researches diamonds and techniques. Through this ever expanding education, the GIA leads the way in the study and evaluation of diamonds. In addition to setting standards and continued research, the Gemological Institute of America also educates gemologists. These certified gemologists work independently of retailers to evaluate GIA certified diamonds.

In 1953, the GIA developed the International Diamond Grading System. This system is commonly referred to as the Four C’s: cut, clarity, color, and carat weight. Headquartered in California, the GIA operates in 13 countries around the globe

What Are The Grading Standards?

To ensure the quality of the diamonds, the GIA uses their grading system to evaluate diamonds. This evaluation looks at the quality of the cut, the clairy and color, as well as the diamond’s carat weight. After inspection by a GIA certified gemologist, a report on the diamond’s quality is written. This report is available in multiple formats, but the primary two are known as the Diamond Grading Report and the Diamond Dossier. While there are a number of differences between the two reports, both reports define the Four C’s of every diamond.

Diamond Dossiers vs Diamond Reports

The GIA uses Diamond Dossiers for color diamonds in the range of D to Z weighing between 0.15 and 1.99 carats. The dossier also includes a microscopic laser inscription of the GIA report number for easy identification. On the other hand, a Diamond Report does not include laser inscription. However, a plotted diagram of the diamond’s clarity characteristics and a graphic representation of the diamond’s proportions are included. This shows a map of the diamond’s inclusions and helps jewelers and jewelry appraisers identify GIA certified diamonds.

GIA Diamond Dossier
A sample GIA Diamond Dossier

Diamonds sold by Adiamor are accompanied by their original diamond certificate. This ensures every diamond we sell is legitimate and of the highest quality. Please visit our diamond education center for more information on diamond certificates.


Why Buy GIA Certified Diamonds?

Why Buy GIA Certified Diamonds?

Adiamor offers a variety of loose diamonds in every shape, carat weight, and quality grade imaginable for your selection as the center stone in any one of our exquisite engagement ring settings. To assure excellence and your peace of mind, every loose diamond sold by Adiamor includes certification by one of the world’s leading gemological labs: the Gemological Institute of America (GIA) or the American Gem Society (AGS).

GIA Diamond Certificate
GIA Diamond Certificate

Since Adiamor’s loose diamond inventory is primarily made up of GIA certified stones, in this post we’ll talk about the key differences and superior qualities that make GIA labs the most widely used and most trusted source of diamond certifications, but first let’s start with a summary of the advantages of purchasing a diamond certified by GIA.

The Main Advantages of buying a GIA Certified Diamond

  1. You know that the diamond you purchase is a natural diamond.
  2. You can easily compare stones due to the consistency of grading.
  3. You will know exactly what you are buying since every important attribute of the diamond is listed in the certificate.
  4. You will get what you pay for.

What is a Diamond Certification?

A diamond certification is a document  provided by the gemology lab to document the lab’s process of inspecting and grading the stone, and to serve as an official report on all identifying or otherwise notable features of an individual diamond. GIA certifications are available in varying levels of detail as diamond grading reports, diamond dossiers, and, most recently, diamond eReports.

To be certified by the GIA, a diamond must be unmounted and have a carat weight of at least 0.15.  To clarify GIA does not certify a ring just a diamond.  Some jewelers or jewelry stores may inaccurately tell you that a ring is certified.  It is possible that the ring has been inspected by a GIA graduate gemologist, but this does not make the ring or the center diamond certified by the GIA laboratory.

Why Choose GIA Certification?

The GIA is known worldwide as the most trusted, precise source for diamond certifications. GIA certification standards and quality grading ranges are the most rigorous of any of the major laboratories, and consequently carry the most added value and guarantee the highest diamond quality.  GIA achieves the highest level of consistency of any of the major laboratories in part by grading diamonds in a consistent environment in all offices including the same lighting, the same paint color on the walls, and the requirement for the graders to wear only certain colors when grading diamonds. As a non-profit organization, GIA maintains a standard of complete integrity and impartiality.

How Do I Know the Diamond and/or Certification is Genuine?

GIA certified diamonds are  laser inscribed with the unique report ID number to protect owners from fraud, and aid recovery in the event of a theft. This number matches the diamond to the report corresponding to its quality grade and identifying features.  Diamonds above 1 carat sometimes don’t have inscription since the inclusion pattern acts like a fingerprint to identify the diamond.

To prevent certificate forgeries and alterations, the GIA also places security features within the document itself including holograms, copy guards, and microprinting, the same features used to prevent fraud in financial institutions.

Thanks to these measures, you know what you are buying and what you will get.  Purchasing GIA certified diamonds online carries no additional risk compared to buying in a store due to the incredible consistency and the ability to validate you have the diamond you paid for.  Customers are assured of the diamond’s authenticity and the veracity of the associated report; consumers even have the option of verifying details directly with the GIA or with a third party gemologist.

Your Diamond’s Unique Features

Quality is determined and cataloged under the famous “Four Cs” of diamond grading: cut, color, clarity, and carat weight. Flaws in the diamond such as inclusions, clouding, pits, and poorly cut facets are noted in both the written report and in an illustration of the diamond showing the location and severity of each flaw.

The diamond’s weight is recorded using a state-of-the-art electronic micro-balance scale that provides an exact measurement to five decimal places, and color grade is determined in a standardized viewing environment. Your GIA certification will also evaluate qualities like the stone’s  polish and symmetry each of which are taken into account for the final overall quality assessment recorded in your diamond’s report.

GIA – The Worldwide Standard for Evaluating Diamond Quality

GIA established the “4Cs” in the 1940s which has become the worldwide standard for evaluating diamond quality.  So if you believe in using the 4Cs to evaluate and compare diamonds you already have some knowledge of and trust for the GIA Laboratory and its certification process.

To learn more about GIA certified diamonds or for assistance in choosing a stone, contact Adiamor’s expert team of gemologists.