Gemological Science International (GSI)

at 581 5th Ave, Fl 4th, New York, 10017 United States

Gemological Science International (GSI) is one of the world's largest gemological laboratory.

Gemological Science International (GSI)
581 5th Ave, Fl 4th
New York , NY 10017
United States
Contact Phone
P: (212) 207-4140


Based in the heart of New York City's Diamond District, GSI is an independent, professional gemological laboratory dedicated to developing innovative solutions to the challenges of gemstone identification and grading. There are 8 offices in the United States, India, Israel and Belgium, providing professional gemstone identification, grading and appraisal services to the fine jewelry industry. GSI has re-engineered the processing paths for gem identification and grading, which has resulted in higher levels of productivity and reduced costs. This cost efficiency is passed on to our customers and ultimately to consumers, making these beneficial grading reports more affordable.

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