The Center Of Gemological Studies (C.G.S)
Was Established By Eli Dori In 1979 And Offers Group & Individual Gemological Courses
According To The Students Preference.

This is the most prestigious, affluent and respected gemological center in the Israeli Diamond Center
and has taught thousands of students that are working in the diamond industry today.
The C.G.S was chosen by the Israeli Diamond Center to teach the future Members the gemological course.

Eli Dori, is a graduate gemologist (G.G) for the last 40 years, he graduated outstandingly in residence of GIA.
Hadas Dori Bar Moshe graduated gemologist with experience of over 25 years.
They will provide you a comprehensive and intensive gemological course,
in an intimate, pleasant and patient environment, that suites and is adapted to every student.

About Eli And Hadas

Eli Dori

Eli Dori

Eli Dori, B.A in economics and accounting from Tel-Aviv University, Graduated Gemologist (G.G.) outstandingly in residence of GIA in California (diamond and colored stones), writer of the book: "Gemology – The Diamond: Sorting & Evaluation".

Hadas Dori Bar Moshe

Hadas Dori Bar Moshe

Hadas Dori Bar Moshe, MBA from Tel-Aviv University, Graduated Gemologist in the Israeli Diamond Center since 1992, has over 25 years of experience in sorting diamonds and teaching gemological courses.