Diamond Lab Report: Difference Between Certification Labs

Are you buying a new piece of diamond jewelry, or selling a piece you no longer wear? A diamond lab report is an important document to help you understand the quality of your piece.  This helps you get the best price when buying and selling a diamond.  A diamond grading report not only provides you with a blueprint of your diamond’s properties and characteristics, but also verifies the diamonds authenticity.

There are many different diamond grading laboratories around the world, but not all laboratories are created equal.  As a consumer it is important to understand the differences between the labs.  One institute may have different results from a report than another issued by a different lab on the same diamond.   Diamond Buyers can help educate a customer on exactly what kind of diamond jewelry you have.

The Gemological Institute of America

The Gemological Institute of America (GIA) is the world’s undisputed authority on diamonds. And, they provide dealers and the public with lab reports.  Headquartered out of Carlsbad, CA, the GIA is non-profit. Therefore, it supplies consumers with non-biased, conservative and consistent grading.  So, this is why it is the most trusted and widely used service.  Other diamond grading labs are for-profit and more liberal in their grading. This leads consumers to believe they have a more rare and valuable diamond.  When in reality, the consumer paid a higher price than warranted.

Let’s look at several examples.

GIA vs. IGI Diamond Lab Report

The International Gemological Institute is the second most well-known lab in the world. Based out of Antwerp, Belgium, the IGI has more lax grading standards than the GIA.  Typically, clarity and color grades can be off by 1 or more ratings if the same diamond was to be graded by GIA standards.

Recently, a customer brought an engagement ring into Diamond Buyers to sell.  The ring had an IGI diamond lab report that stated the center diamond was a 0.93CT “G” color grade, “I1” clarity and “good cut” grade.  Diamond Buyers has jewelry experts who are actually certified diamond graders through GIA.  After purchasing the ring from the customer, the center diamond was sent to GIA to be graded at their lab.  The diamond came back 0.93CT “G” color grade, but “I2” clarity grade.  The clarity grade was lower in the GIA lab report than the IGI report which makes a big difference in the value of the stone. And, this in turn can make it harder to resell.

 

GIA vs. EGL Diamond Lab Report

The European Gemological Laboratory has a large global presence, with several offices in Europe.  EGL is known within the industry as being very lenient, and most diamond dealers try not to use EGL.  This is due to the color and clarity grades tend to be 2-3 higher than if the diamond was graded by GIA standards.  Again, this leads the consumer to believe they have a better quality diamond. And in turn, the consumer usually overpays for that diamond.

Diamond Buyers had a customer bring in a three stone ring.  The center stone was GIA certified, but the two side diamonds were EGL certified.  Both side diamonds were graded 1.01CT “Fancy Intense Yellow” color and “VS2” clarity.  However, Diamond Buyers’s jewelry expert examined this ring and noticed more brownish hues in the side diamonds.  After explaining the lab differences to the client, the client understood and knew that the value of the ring would be less than she originally thought.  After Diamond Buyers purchased the ring, the two side diamonds were sent to GIA to be certified.  One diamond was “Fancy Deep Brownish Yellow” color and “VS1” clarity and the other diamond was “Fancy Deep Brownish Yellow” color and “SI1” clarity. So, this makes a big difference in the value of the diamond because Fancy Yellow diamonds are much more rare and valuable than Fancy Brown diamonds.

 

Diamond Buyers Will Help You Understand the Quality of Your Diamond

Customers who have a GIA diamond lab report on a diamond, will ensure the seller and buyer are on the same page in regards to diamond quality.  Also, Diamond Buyers shows clients comparable GIA graded diamonds on the wholesale market, in order to determine the diamond’s true liquidation value.  So, if you are interested in selling your diamond, start the online process with Diamond Buyers today.  Our diamond experts can explain the true value of your diamond and fund you the same day!