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Gemology Certification Practice Test VIP Certification Exam
Gemology Certification Practice Test — This practice exam mirrors the GIA (Gemological Institute of America) Graduate Gemologist (GG) certification curriculum, which covers diamond grading, colored stone identification, gem properties, treatments, and synthetics across multiple proctored course exams; no single unified 'Gemology Certification' exam exists, so this is an original comprehensive practice set modeled on GIA GG standards and industry-recognized gemological competencies.
55
Questions
90m
Time Limit
75.00%
To Pass
Question 1 of 55👑 VIP
A customer brings in a blue stone set in a platinum ring and claims it is a natural sapphire. Under the refractometer, you measure a refractive index of 1.762–1.770. The stone also shows moderate trichroism (blue, violet-blue, and pale yellow) under the dichroscope. Which of the following conclusions is MOST supported by these observations?
Questions 2–55 and full explanations are VIP-exclusive.