Our courses and workshops - Your gateway to success

The International Center of Gemological Studies (I.C.G.S), established in 1979, has taught thousands of students that are working in the diamond industry worldwide. Our unique method of teaching provides an intimate, adapted environment to guarantee individual progress and success.

Gemology Course

Gemology Course

A comprehensive 80 hour course and an official I.C.G.S certificate. The purpose of the course is to provide excellent and accurate grading abilities of polished diamonds by microscope and by loupe.

Gain deep understanding of the world of diamonds including a business-oriented point of view.

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Intro to Gemology

Intro to Gemology

A 12 hour introductory course to the enchanting world of gemology. Learn the basics on evaluating and grading diamonds by the 4Cs: Carat weight, Clarity, Color and Cut.

Experience real practical grading using professional loupe and tweezers.

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Tailor-Made Workshops

Tailor-Made Workshops

A customized workshop at your place of business. Adjusted for your needs, in order to train and refine your teams’ skills and abilities regarding grading and evaluating polished diamonds by the 4Cs and more.

We will observe loose diamonds as well as diamonds that are set in jewelry in order to enhance and improve your business results and sales.

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Latest Articles

The weight of the diamond

CARAT WEIGHT 1 Carat= 1/5 gram = 0.2 gram = 100 points 5 Carats = 1 gram only 1/2 Carat = 50 points 1/4 Carat = 25 points The origin of the name Carat comes from the Carob tree which is called “Ceration” in Greek. Each carob seed equals 1 carat. 1/4 Carat = 1 […]

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Color of Diamonds

Color of Diamonds

D, E, F -These are the whitest diamonds, colorless and are often called “collection” diamonds. The difference among them is the transparency and clarity of the color. Other nick names for these diamonds are: River. When you want to note that the diamond is so white, that it looks whiter than D color, it is […]

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Clarity of Diamonds

Clarity of Diamonds

Only in 1953 the GIA started to grade clarity & color in the grading scales we use today. The clarity grade of a diamond is determined by its clarity inclusions that divide into three: Internal Characteristics (inclusions) These inclusions badly affect the clarity because: It is difficult to repair them – repairing them substantially reduces […]

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Meet the team

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: grading & Evaluation”.

Hadas Dori Bar Moshe

Hadas Dori Bar Moshe

MBA from Tel-Aviv University, Graduated Gemologist in the Israeli Diamond Center since 1992, has over 28 years of experience in grading diamonds and teaching gemological courses.

Benny Poplicher

Benny Poplicher

Graduated Gemologist in the Israeli Diamond Center since 1995 and a member of the Israeli Diamond Exchange.
A wholesaler of diamonds all over the world, specializes in the U.S market

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