Jonathan Tack Joins GSI as Executive Vice President of Business Development

Jonathan Tack GSI

For immediate release,Jan 10,2022 (New York, NY): Gemological Science International (GSI), one of the largest gemological organizations in the world and a global leader in diamond and jewelry certification, announced today that Jonathan Tack will join the organization as Executive Vice President of Business Development. 

“I am thrilled to welcome Jonathan Tack to GSI,” says Debbie Azar, President and Co-Founder of GSI. “Our team is made up of leaders from the diamond and jewelry industry, and I am confident that Jonathan’s enthusiasm, energy, and vast industry knowledge will help GSI achieve continued growth and success.”

Jonathan has over 25 years of experience in the luxury goods sector. Following a decade of service as Vice President of Sales for Suberi Brothers where he revamped the legacy brand and launched e-commerce, Tack then founded Proposition Love where he designed for Cher, Kathy Griffin, and Tori Spelling and even appeared on the Chelsea Handler Show. Later, he led sales and marketing at Beauty Gem and SDC Designs. Throughout his career, Jonathan has successfully guided cross-functional teams while launching products into new markets, developing business strategies for multi-channel sales, and fostering lucrative partnerships.His professional drive and loyal relationships have brought him great success which he plans to continue at GSI.

“I am delighted to join such an esteemed and prestigious global organization,” says Jonathan Tack, Executive Vice President of Business Development, GSI. “The GSI team is building consumer trust and confidence in our industry through its integrity and innovation. I look forward to creating new opportunities that will be beneficial for GSI and for the entire diamond and fine jewelry industry.”

GSI is a globally renowned gemological organization that offers a myriad of services to the diamond and jewelry industry including grading reports and services for diamonds (both natural and lab-grown), colored gemstones, and jewelry. GSI is the leader in the testing and detection of undisclosed lab-grown diamonds in finished jewelry. The company also offers a variety of educational programs to the trade and has a dedicated internationally recognized team of researchers, scientists, and professionals committed to advancing gemological research in the industry.

For more information, please visit www.gemscience.netor to schedule an interview, please contact Duvall O’Steen of Luxury Brand Group (duvall@luxbrandgroup.com).

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.

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Paree Bhattacharya
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FAQ

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 gemscience.net 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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