GIA Diamonds & Diamond Grading Study Guides & Exam Prep | Stuvia

GIA Diamonds and Diamond Grading Final Exam #2 EXAM LATEST
VERSION NEWEST ACTUAL EXAM COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
1. What group was critical to De Beers's early sales strat- London Diamond Syndi-
egy? cate

2. How are gem-quality rough diamonds sorted? Color

3. What generation was first to connect with diamonds Baby Boomers
as a representation of lifetime commitment?

4. Where did the diamond industry first start? India

5. What describes the concept of centrally controlled Single-channel marketing
supply, purchase, promotion, and sales of rough dia-
monds?

6. What mantle layer is most dense? Lower mantle

7. What happens to diamond if lamproite stalls in the Will turn into graphite
continental crust?

8. When does subduction occur? When a continental and
oceanic plate collide

9. How are metamorphic rocks formed? High heat and high pres-
sure

10. What is an example of a superdeep diamond? CLIPPIR diamonds, blue
diamonds, Brazil's Junia
diamond

11. What might black spinel in a mineral sample indicate? A good sign that a pipe is
nearby

12. What equipment might offshore deep-sea diamond Robotic/automated
mining use? crawlers



, GIA Diamonds and Diamond Grading Final Exam #2 EXAM LATEST
VERSION NEWEST ACTUAL EXAM COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
13. What deposit type produces most diamonds mined Primary deposits
today?

14. What type of sampling gives an initial idea of diamond Character sampling
quality for a deposit?

15. Where are rocks and geological structures similar to Brazil
Africa found due to ancient connections?

16. What is another term for crystal lattice? Crystal structure

17. What type are most natural diamonds? Type Ia

18. What is a smooth, flat break in a crystal parallel to a Cleavage
cleavage plane?

19. What is a flat, triangular, twinned diamond crystal? Macle

20. What types of point defects are found in diamonds? Intrinsic defect and extrin-
sic defects

21. What influences light absorption, resulting in bodycol- Color center
or?

22. What trace element can cause a violet color in dia- Hydrogen-related defects
monds?

23. How does the energy emitted by a gem compare to Lower
the energy it absorbs?

24. What type of light combines all the colors in the visible White light
spectrum?

25. What is the most common cause of yellow color in Nitrogen defects
diamonds?


, GIA Diamonds and Diamond Grading Final Exam #2 EXAM LATEST
VERSION NEWEST ACTUAL EXAM COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)

26. What controls light path length within a diamond? Cutting

27. What term describes a gemstone's surface in reflected Luster
light?

28. What describes the flashes of spectral colors seen in a Fire
polished diamond?

29. What was the main goal of research in developing the Determine which propor-
GIA Cut Grading System? tion combinations create
the most attractive light
performance

30. What best describes the angle of incidence? Measured btwn the nor-
mal and the reflected light

31. What process splits diamond rough along its cleavage Cleaving
plane?

32. What do cutters evaluate to determine when to use a Strain
scaife for coning?

33. What made true round-shaped diamonds possible? Bruting

34. What was the prototype of the modern round brilliant Old European cut
cut?

35. What does a dop do? Holds/secures a diamond
in place

36. What does HPHT stand for? High pressure, high tem-
perature

37. Cuboctahedrons