Diamond 4Cs: Clarity

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As the world’s natural diamonds formed, chemicals and elements present in the earth became trapped within the crystals. Clarity grading evaluates a gemstone’s relative freedom from internal and surface characteristics. This eLearning course teaches core gemological education while emphasizing information buyers and sellers find most relevant at point of sale.



Diamond 4Cs: Clarity | Course 103

This eLearning course provides important information about the components of clarity and how they are assessed, the clarity grading scale, definitions of many inclusions and blemishes, variables which can make inclusions more visible in certain diamonds and primary consumer concerns regarding clarity.

Learn with IGI

IGI grades more diamonds, gemstones, and jewelry in more locations around the world than any other gemological organization. IGI is the world’s first institute to hold ISO Accreditation in both natural and lab grown diamond grading and the only worldwide institute protecting consumers by grading finished diamond jewelry, as well as loose gemstones.

Diamond 4Cs: Clarity | Course 103



Companion Courses: Diamond Program*

  • 4Cs: Carat Weight
  • 4Cs: Color
  • 4Cs: Cut
  • The Natural Diamond Story
  • Lab Grown Diamonds

*Pass all six Diamond Program courses to receive an IGI Certificate of Completion

Diamond 4Cs: Clarity | Course 103

  1. The components of clarity grading
  2. The clarity grading scale
  3. Common clarity characteristics
  4. The visibility of inclusions
  5. Clarity and consumer concerns