At the end of the training program, the participant will be able to:

  1. Separating natural diamond from imitation and its synthetic counterparts
  2. Measure and weigh diamond
  3. Assign colour grade
  4. Assign clarity grade
  5. Determine cut grade
  6. Explain the content in certified diamond quality report


  • Introduction to the basics of diamonds, their properties, the sources of diamond and the worldĄŻs market structure.
  • The grading criteria for diamond - the 4 Cs; clarity, colour, cut and carat weight.
  • Using instruments to perform diamond grading, with emphasis on the ten-power handheld loupe to grade diamond and identify diamond simulants.
  • The various types of surface features and inclusions in diamond and understand how they affect the grading of clarity in diamonds.
  • The colouring elements in diamonds, the colour grading system and definition and establishing colour grade by using comparison stones.
  • The importance of cutting proportion and its impact on grading. Understand the various considerations for different types of shapes of diamonds.
  • Learn the weighing system used and weight estimation methods.
  • Understanding the different types of simulants such as cubic zirconia, synthetic moissanite, synthetic rutile, strontium titanate, and their separation techniques.
  • Understand different types of diamond treatments, such as irradiation, high pressure high temperature (HPHT), surface coating, glass filling, laser drilling, and the techniques used to identify them.
  • Learn the process of producing synthetic diamonds and their identifying characteristics. Introduction to the various identification methods and instruments used in separating synthetic diamonds.
  • Intensive practical sessions.

Duration : 40 hours. (16 sessions).

Course fee : S$1500.00

Prerequisites: basic language literacy and reasonably good eye sight.