Gemological Science International is an independent gemological organization committed to combining state-of-the-art technology with proven industry experience and the highest standards of integrity At GSI we had a vision: to create a modern, state-of-the-art diamond grading laboratory that takes advantage of the latest breakthroughs in diamond grading innovation. To do this, we re-engineered the diamond grading process and based it on foolproof cutting-edge technology and automation. The result

Gemological Science International (GSI) is an independent gemological organization with a global footprint. GSI is the only major gemological laboratory established in the 21st century. We provide reliable gemstone identification and grading services, conduct gemological research to protect the industry and consumers, and offer a variety of educational programs to the trade and general public preparing a new generation of professionals. Since our founding in 2005 with one laboratory in New York