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- Gemological Science International
New York, United States 
BRONZE
Nature Of Business :
Education Institute, Services
Dealing In :
Jewelry Designing, Certification Courses
Total Items:
0
Established In:
2006
Gemological Science International (GSI) is the only major gemological body established in the 21st century. Founded in 2005 in New York City, it provides reliable gemstone identification and grading services, is engaged in gemological research, and also offers a variety of educational programs.
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