Your Guide to Highly Subjective Lab Grades

The inconsistencies with diamond grading labs are not new.

Just a bit of research will reveal that diamond gradings from even the most reputable labs are highly subjective and will vary between labs- and even with the same stone at an individual lab.

In 2004,, a consumer diamond advocacy and education website, sent 17 diamonds to three of the industry’s biggest gemological laboratories for grading. The survey reported that none of the stones was given the same color and clarity grading by all three labs. One diamond was given two different clarity ratings by one lab alone.

A recent Rapaport survey sent 10 diamonds to top grading labs in the United States and abroad and reported similar findings.

The current system for grading and evaluating diamonds began in the early 1950s. After more than 60 years of the same (and flawed) practices, changes are on the horizon. There are certificates, but the grading is subjective. The industry can only hope that moving forward grading will become more objective and consistent.

Trust the Source

When buying diamonds, look at more than just the lab grades.

Research will uncover trends behind the top diamond grading organizations. Understanding the reputations of different labs can give you an idea of how strict or loose an organization is, although even the reputations are inconsistent.

Beyond the labs, trust the diamond source. GN Diamond has been in existence for over 35 years with offices in Israel and Philadelphia. Take a look at the testimonials or chat with any of the countless businesses GN Diamond has worked with and you will have one consistent finding: GN Diamond provides quality diamonds.

Beyond the ratings, many customers can see the difference in quality and build trust with brand relationships built on quality diamonds.

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