Global Accreditation

Gemological Science International Achieves Global Accreditation as Verifier of Sustainability Rated Diamonds

SCS Accredited Global Gem Identification Verification Provider

Gemological Science International (GSI), one of the largest gemological organizations in the world, achieved SCS Global Gem Identification Verification Provider accreditation for its laboratories and offices around the world. All SCS-007 certified diamonds that are graded, scanned, and laser inscribed by GSI, and which have accompanying information on laser inscription, diamond dimensions, and carat weights, can carry the approved Sustainability Rated claim of achievement.

“At GSI, we are committed to being a leader in sustainability standards for fine jewelry,” says Debbie Azar, President, and Co-Founder of GSI. “As an industry, we must work together to ensure sustainable and responsible processes throughout the entire global supply chain. Transparency and traceability are essential for responsible supply chains and sustainability related claims. GSI supports the positive impact of doing good and responsible business, as embodied by companies compliant with the SCS-007 standard.”

In its Gem IdentificationVerification ProviderAccreditation document, SCS confirmed that GSI’s global laboratories meet the accreditation criteria as Gem Identification Facilities required for Origin Traceability Assurance under the SCS-007 Jewelry Sustainability Standard – Sustainability Rated Diamonds. Each diamond from an SCS 007 accredited Production Operation that is graded and laser inscribed by GSI is eligible to be identified as a Certified Sustainability Rated Diamond on the GSI Grading Certificate, provided that the diamond has also been Source Signature verified.

“Our accreditation of GSI independently affirms its technical competence and capacity to fulfill this vital traceability function in the diamond chain of custody from origin to consumer,” said Stanley Mathuram, SCS Global Services executive vice president. “We are pleased to have GSI on-board.”

Earlier this year, GSI announced its commitment to the United Nations Sustainable Development Goals through “GSI ‘s Path to a Positive Impact” initiative. The plan outlines how GSI will implement new procedures, policies, and programs to work towards fulfilling the goals set out by the U.N.

About GSI:

Gemological Science International (GSI) is the only major gemological organization established in the 21st century. Founded in 2005 in New York City, it has grown to become one of the largest gemological entities in the world with laboratory facilities spanning four continents. Utilizing cutting-edge processes and proprietary technologies, along with a commitment to the highest ethical standards and practices, GSI provides manufacturers and retailers globally with a wide range of gemstone identification and grading services. The company is committed to advancing gemological research and offers gemological educational programs for trade professionals and the general public through its state-of-the-art research center.

About SCS Global Services:

SCS Global Services is an internationally recognized leader in third-party certification of environmental and sustainability claims. Headquartered in Emeryville, California, SCS has representatives and affiliate offices throughout the Americas, Asia/Pacific, Europe and Africa. It is the certification arm of Scientific Certification Systems, Inc., a chartered benefit corporation. Additional information is available at

About SCS-007:

The SCS-007 Standard, developed under an international multi-stakeholder process,establishes a uniform basis for independently assessing and certifying the environmentally and socially responsible production and handling of all diamonds, whether mined or laboratory grown, and for making business and consumer-facing claims for such diamonds. The Standard spells out extensive environmental, social and governance (ESG) requirements, confirms producer efforts to achieve climate neutrality as well as net zero life cycle impacts, and introduces a comprehensive set of checks and balances to accurately track certified diamonds through the entire chain of custody, providing an unprecedented level of origin assurance greater than 99%. Sustainability investments round out the requirements, benefitting artisanal and small-scale miners (ASM) and other vulnerable communities.For more information, visit

For more information about GSI or the new sustainability accreditation or to schedule an interview, please contact Duvall O’Steen of Luxury Brand Group ( or email

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Where is Gemological Science International (GSI) located?

GSI is headquartered in New York, NY. It has 13 laboratories on four continents and in a number of countries: the United States, India, Dubai, Israel, Belgium, Hong Kong, and Botswana. This makes GSI one of the largest independent gemological organizations in the world.

Is there a difference between grading reports issued by different GSI laboratories?

All GSI laboratories grade using the same methods and adhere to the same standards. Every laboratory is staffed with highly trained professionals who have years of grading experience and an extensive gemological background.

What does it mean when a sales associate tells me my diamond is “GSI Certified” or is accompanied by a “GSI Certificate”?

The phrases “GSI Certificate” and “GSI Certified” are industry shorthand for GSI grading or identification reports. What this means to you is that expert gemologists and trained professionals meticulously evaluated the item. When your diamond, jewelry or gemstone is accompanied by a GSI grading report, you can be completely confident in the accuracy and objectivity of the evaluation.

Where can I find “GSI Certified Diamonds”?

GSI diamond grading and identification reports can be found in jewelry stores worldwide and online. Insist on a GSI grading report when shopping for a diamond, jewelry or gemstone.

What do I do if I lose my GSI Diamond Report?

Every GSI grading report is available on our website. Please visit and go to “verify your report”. Enter your GSI report number and you’ll instantly have access to a digital copy of it. You can also email us through the website to request a copy.

What are the 4Cs

A beautiful diamond is one of nature’s most mesmerizing creations. But how do you objectively judge the quality of the gem? The 4Cs – Cut, Color, Clarity, and Carat Weight – are the universal standard for doing this.

Is there anything beyond the 4Cs?

The 4Cs are an essential and important description of a diamond’s characteristics. But there is a considerable amount of detailed information behind each “C” along with other qualities of a diamond that affect its beauty, such as fluorescence, light performance and more.

How much do you need to know? That’s up to you, but knowing the 4Cs is almost essential.

What does a GSI diamond grading report look like?

GSI offers a number of grading reports (often referred to as “GSI Certificates”). You can see samples of them by browsing the Grading Reports page on our website.

What does a GSI colored diamond grading report look like?

You can see samples grading reports by browsing the Grading Reports page on our website.

What does a GSI Colored stone report look like?

You can see samples of Colored stones reports by browsing Grading Reports page on our website.

How does a GSI grading report compare to other laboratories that issue grading reports?

It is our policy not to comment on other laboratories. However, know that GSI adheres to the highest ethical standards. We do this in a number of ways:

  • Rotating gemologists to our different labs
  • Continuously upgrading our proprietary grading software to ensure full compliance with international grading standards
  • Having our gemological research department constantly investigate new developments in the industry, which informs the grading process

What’s the difference between a “GSI Certificate” and a “GSI Diamond Grading Report”?

GSI issues a variety of grading and identification reports. Consumers and industry professionals often call these reports “GSI Certificates”.

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