By Michelle Graff
Gemological Science International just opened a second New York City location that will be dedicated solely to screening set jewelry for man-made diamonds. Seen here is a GSI grader using the DiamondView, a machine created by De Beers’ IIDGR for detecting CVD-grown diamonds.
New York—Gemological Science International just opened a new facility in New York that does nothing but test jewelry for lab-grown diamonds.

The lab caters to GSI’s retail customers in the United States, and the company said it will serve as a hub for both manufacturers and retailers that want to have their diamond jewelry screened before it goes into a store.

It is located at 37 W. 47th St., between Fifth and Sixth Avenues, and will be the second New York location for the company, which has a lab at 581 Fifth Ave. as well.

GSI said it plans to continue to expand worldwide, starting with Hong Kong, where it opened a new facility this month.

GSI Hong Kong is located at Kaiser Estate Phase 1, 37-45 Man Yue St, Hunghom KL Hong Kong, Ste. A3 (5th floor). The lab grades loose diamonds and diamond jewelry, and screens and tests jewelry for lab-grown diamonds.

For more information on Gemological Science International or any of its labs, visit GSI’s website, email This email address is being protected from spambots. You need JavaScript enabled to view it. or call 212-207-4140.

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