Gemology Certification Cheat Sheet 2026

The 30 highest-yield Gemology Certification facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is a communication plan in Gemology Certification project management? → Defining what information is shared, with whom, when, and how
2. Which test helps determine if a gemstone is singly or doubly refractive? → Polariscope
3. Which cut is known for maximizing the brilliance of a diamond? → Round brilliant cut
4. What is conflict resolution in Gemology Certification leadership? → Addressing disagreements constructively to find acceptable solutions
5. Which property does a spectroscope reveal in a gemstone? → Absorption spectrum
6. What is the name of the thin band that forms the outer edge of a faceted gemstone, separating the crown from the pavilion? → Girdle
7. What grinding medium is most commonly used on a lapidary wheel to shape gemstones harder than quartz? → Diamond abrasive
8. In millimeter measurements for jewelry design, what does 'mm' gauge refer to in the context of wire and sheet metal? → The thickness or diameter of the metal in millimeters
9. What is the triple constraint in Gemology Certification project management? → The interdependent relationship between scope, time, and cost
10. Which instrument allows a gemologist to see internal inclusions within a gemstone? → Microscope
11. What is financial forecasting in Gemology Certification practice? → Predicting future conditions based on historical data and trends
12. What setting type completely surrounds the girdle of a gemstone with a continuous wall of metal? → Bezel setting
13. High-pressure, high-temperature (HPHT) treatment is primarily used on diamonds to improve which characteristic? → Color, by reducing or eliminating brownish or yellowish tints
14. Which geological process is primarily responsible for the formation of diamonds? → Igneous processes
15. Which mineral class includes most gemstones like quartz and beryl? → Silicates
16. Which tool is most commonly used to determine the carat weight of a gemstone? → Precision scale
17. The 'flash effect'—an iridescent blue or orange flash visible under magnification—is most diagnostic of which treatment? → Fracture filling
18. What is the meaning of the term 'extinction' as used in gemstone cutting evaluation? → Dark areas in a faceted stone where no light is reflected back to the viewer
19. What is the 'spread' of a gemstone in lapidary terms? → The face-up size of a stone relative to its carat weight
20. What is 'bruting' in diamond cutting? → Rounding the diamond's girdle by spinning two diamonds against each other
21. What is a corrective action plan in Gemology Certification compliance? → A strategy to address deficiencies and prevent recurrence
22. What is trend analysis in Gemology Certification reporting? → Examining data over time to identify patterns and changes
23. What is active listening in Gemology Certification practice? → Fully concentrating on the speaker and providing thoughtful feedback
24. What is the hierarchy of controls in Gemology Certification risk management? → Elimination, substitution, engineering, administrative, then PPE
25. A diamond described as 'laser drilled' has undergone a treatment intended to improve which property? → Clarity
26. What does the hallmark 'PT950' on a piece of jewelry indicate? → 950 parts per thousand (95%) pure platinum
27. What is a dashboard in Gemology Certification reporting? → A visual display of key metrics for at-a-glance performance monitoring
28. What is a compliance audit in Gemology Certification practice? → A systematic review verifying adherence to requirements and policies
29. What is the primary goal of regulatory compliance in Gemology Certification practice? → Ensuring adherence to laws and standards governing professional practice
30. What is effective delegation in Gemology Certification management? → Assigning authority and tasks while maintaining accountability