CDG Professional Standards & Competencies 2

Question 1

A diamond grader receives a stone for grading from a retail jeweler who is also a personal friend. What is the most professionally appropriate action?

Accepted Answer

Grade it as usual while disclosing the relationship to your supervisor

Answer

Disclosing personal relationships while still grading objectively upholds transparency and professional integrity.

Question 2

Which organization's grading standards are most widely recognized as the global benchmark for diamond grading?

Accepted Answer

Gemological Institute of America (GIA)

Answer

GIA established the 4Cs system and its standards are the most universally accepted benchmark in the diamond industry.

Question 3

When calibrating a gemological microscope at the start of a grading session, a grader notices the reticle scale does not match the reference standard. The correct response is to:

Accepted Answer

Recalibrate or remove the instrument from service until repaired

Answer

Instruments that fail calibration checks must be removed from service to ensure grading accuracy and report integrity.

Question 4

A client requests that a grader match a competitor laboratory's lower clarity grade on a previously graded stone. The grader should:

Accepted Answer

Re-examine the stone and grade it independently without reference to the competitor's grade

Answer

Professional graders must assess each stone independently; client pressure to alter grades compromises scientific integrity.

Question 5

Which of the following best describes 'grading consistency' in a professional diamond laboratory?

Accepted Answer

Graders apply the same criteria and standards so results fall within an acceptable tolerance range

Answer

Grading consistency means applying standardized criteria so results are reproducible within a defined tolerance, not necessarily identical.

(CDG) Certified Diamond Grader Practice Test

(CDG) Certified Diamond Grader Practice Test

CDG Professional Standards & Competencies 2