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