DCA Cheat Sheet 2026

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

1. Which type of ring setting holds a diamond using four or six thin metal prongs? → Prong setting
2. What is the primary purpose of maintaining accurate professional documentation? → To create a legal record of services and support continuity of care
3. How should a Certified Diamond Council of America Diamond Specialist professional handle situations beyond their expertise? → Refer to a qualified specialist and communicate transparently with the client
4. Why is it important to use high-quality materials in jewelry repair? → To maintain the jewelry's quality and longevity
5. What is a 'halo setting' in engagement ring design? → A ring of small diamonds surrounding the center stone
6. What is the appropriate response to witnessing unethical conduct by a colleague? → Report the conduct through established channels and document observations
7. What notation does a GIA grading report use to indicate that a diamond has undergone fracture filling? → GIA does not grade fracture-filled diamonds and returns them without a report
8. What is the most important principle in professional Certified Diamond Council of America Diamond Specialist practice? → Maintaining competence through continuous learning and adherence to standards
9. What is the significance of the C.I.T.I.E.S. agreement for diamond trade? → It ensures that diamond trade does not harm endangered ecosystems
10. What is clarity in diamond grading? → The diamond's clarity, or lack of imperfections
11. How should Certified Diamond Council of America Diamond Specialist professionals approach quality improvement? → Through systematic evaluation of outcomes and implementation of evidence-based changes
12. An independent retailer wants to go beyond KP compliance. Which additional step would most meaningfully enhance their ethical sourcing practices? → Joining or purchasing from suppliers certified by the Responsible Jewellery Council
13. What does diamond certification ensure? → It confirms that the diamond meets industry standards for quality
14. What is the role of active listening in customer service? → It ensures that the customer feels heard and valued
15. When designing a pave setting for a curved surface, the setter must account for: → Adjusting bead placement for the curvature so stones sit level
16. Why is it essential to check for scratches on a diamond during repair? → To maintain the diamond’s visual appeal and quality
17. What is the role of the World Diamond Council's System of Warranties in day-to-day retail transactions? → It extends KP assurances through the polished supply chain via invoice warranties
18. Which of the 4Cs has the greatest impact on a diamond's price per carat for two otherwise identical stones? → Carat weight
19. How should Certified Diamond Council of America Diamond Specialist professionals approach quality improvement? → Through systematic evaluation of outcomes and implementation of evidence-based changes
20. Which cutting style features long, rectangular facets arranged in parallel rows? → Step cut
21. How do treated diamonds generally compare to untreated diamonds of similar apparent quality in terms of resale or trade-in value? → Treated diamonds typically sell for less than untreated stones of similar apparent grade
22. In a round brilliant cut, what are 'kite-shaped' facets on the crown called? → Bezel facets
23. What constitutes a boundary violation in professional practice? → Engaging in dual relationships that could impair professional judgment
24. What is the function of investment material in the lost-wax casting process? → It forms a mold around the wax pattern that withstands molten metal temperatures
25. A retailer receives diamonds with a warranty statement attached to the invoice. What does this warranty primarily confirm? → The diamonds are conflict-free to the best of the seller's knowledge
26. Why is it important to build rapport with customers in the diamond industry? → It helps create a long-term relationship and future sales
27. What role does documentation play in Certified Diamond Council of America Diamond Specialist professional practice? → It creates accountability, supports decision-making, and provides legal protection
28. Why is staying current with industry developments important for Certified Diamond Council of America Diamond Specialist professionals? → To provide the best possible service using current knowledge and practices
29. When comparing two diamonds of equal cut, color, and clarity, a 1.00 ct stone will typically cost more per carat than a 0.90 ct stone primarily because: → Magic sizes carry a market premium
30. Why is product knowledge important in sales? → It ensures that customers are fully informed and can make confident decisions