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Certified Diamond Grader (CDG) Exam

The Certified Diamond Grader (CDG) exam certifies an individual's ability to accurately grade and evaluate diamonds based on the 4Cs (Carat, Cut, Color, Clarity).

100
Questions
120 min
Time Limit
75%
To Pass
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Exam Rules

  • You can skip questions and return to them later
  • Flag questions for review before submitting
  • No feedback shown until you submit the entire exam
  • Unanswered questions count as wrong — answer everything
  • 10 pretest questions are mixed in and don't affect your score
  • Timer auto-submits when time runs out
  • Your progress is auto-saved every 30 seconds