GIA Diamonds and Diamond grading EXAM LATEST VERSION NEWEST
ACTUAL EXAM COMPLETE 150 QUESTIONS AND CORRECT DETAILED
ANSWERS
1. Beneficiation A commitment to reserve a portion of the resources derived from any country for
the economic development of that country.
2. Blemish Clarity characteristic that's confined to the surface of a polished gemstone.
Characteristic or irregularity confined to the surface of a polished gemstone.
3. Blockchain A shared, unalterable ledger used to record transactions and track assets through
a supply chain or business network.
4. Blocking Placing the first 17 or 18 facets on a diamond, including the crown and pavilion
main facets, table, and sometimes a culet.
5. Bort A form of industrial-grade diamond that usually occurs as very included single
crystals in a range of yellows, grays, and browns.
6. Bow-tie A dark area across the center of an elongated brilliant cut.
7. Brightfield illumi- Lighting a diamondfrom below to create a bright background.
nation
8. Brightness The ettect of all the diamond's internal and external reflections of white light.
9. Brilliant cut Cutting style with triangular or kite-shaped facets that radiate from the center
toward the girdle.
10. Brillianteering Placement and polishing of the star and upper and lower girdle facets.
11. Bruting Forming the basic face-up outline of a round or rounded shape diamond to
prepare it for faceting.
12. Bulk sampling Large-scale character sampling.
13. Carbonado An aggregate of many randomly oriented interlocking tiny diamond crystals that
is the toughest form of diamond.
, GIA Diamonds and Diamond grading EXAM LATEST VERSION NEWEST
ACTUAL EXAM COMPLETE 150 QUESTIONS AND CORRECT DETAILED
ANSWERS
14. Carbonate A class of chemical compounds that contain carbon and oxygen.
15. Catalyst A substance that increases the rate of a chemical reaction.
16. Cave mining An underground mining technique in which orebody is drilled beneath the
surface, loosened, and collected as it falls.
17. Central Selling Or- An agency designed to purchase, sort, evaluate, and sell rough diamonds.
ganisation (CSO)
18. Character sam- Testing for the size, shape, clarity, and color of the diamonds in a deposit.
pling
19. Characteristic col- The basic face-up color of a colored diamond.
or
20. Clarity character- Internal or external feature of a gemstone that helps determine its quality.
istic
21. Cleavage A smooth, flat break in a gemstone parallel to planes of atomic weakness.
22. Cleavage plane Plane parallel to a possible crystal face, where a diamond can split cleanly when
struck.
23. Cleaving Dividing a diamond into two or more pieces along a cleavage plane.
24. CLIPPIR dia- Cullinan-like, Large, Inclusion-Poor, Pure, Irregular, and Resorbed diamond.
monds
25. Color center A small defect in the atomic structure of a material that can absorb light and give
rise to a color. Structural defect that influences an object's absorption of light and
can cause its color.
26. Color lamellae Closely spaced grain lines where color concentrates.
, GIA Diamonds and Diamond grading EXAM LATEST VERSION NEWEST
ACTUAL EXAM COMPLETE 150 QUESTIONS AND CORRECT DETAILED
ANSWERS
27. Coning The process of forming the pavilion angle by gradually polishing ott the extra
material at ditterent angles.
28. Consignment A selection of goods loaned to a dealer by another wholesaler or a gem cutter.
29. Core Earth's innermost layer.
30. Cost-plus model Model in which final sale price is based on the cost to produce the product plus
a small markup.
31. Covalent bond A chemical bond formed by two atoms sharing electrons.
32. Craftsmanship The care that goes into the fashioning of a polished diamond, as confirmed by
its finish.
33. Cratons Ancient, large, and stable parts of the earth's continental crust.
34. Critical angle Angle between the normal and the maximum angle of refraction, which is the
largest angle at which rays inside the diamond can escape.
35. Crossed polariz- Two polarizers with their light-transmitting directions aligned perpendicularly so
ers light cannot transmit through them.
36. Crown angle The angle formed by the bezel facets and the girdle plane.
37. Crown height per- The distance from the girdle plane to the table, expressed as a percentage of
centage average girdle diameter.
38. Crust The surface and outermost layer of the earth.
39. Crustal diamond Rare diamond that forms in the continental crust or near the earth's surface due
to meteorite impact or tectonic plate collision.
40. Crystal planes Any set of parallel and evenly spaced planes distributed along certain crystal
directions in which atoms are most likely packed.
ACTUAL EXAM COMPLETE 150 QUESTIONS AND CORRECT DETAILED
ANSWERS
1. Beneficiation A commitment to reserve a portion of the resources derived from any country for
the economic development of that country.
2. Blemish Clarity characteristic that's confined to the surface of a polished gemstone.
Characteristic or irregularity confined to the surface of a polished gemstone.
3. Blockchain A shared, unalterable ledger used to record transactions and track assets through
a supply chain or business network.
4. Blocking Placing the first 17 or 18 facets on a diamond, including the crown and pavilion
main facets, table, and sometimes a culet.
5. Bort A form of industrial-grade diamond that usually occurs as very included single
crystals in a range of yellows, grays, and browns.
6. Bow-tie A dark area across the center of an elongated brilliant cut.
7. Brightfield illumi- Lighting a diamondfrom below to create a bright background.
nation
8. Brightness The ettect of all the diamond's internal and external reflections of white light.
9. Brilliant cut Cutting style with triangular or kite-shaped facets that radiate from the center
toward the girdle.
10. Brillianteering Placement and polishing of the star and upper and lower girdle facets.
11. Bruting Forming the basic face-up outline of a round or rounded shape diamond to
prepare it for faceting.
12. Bulk sampling Large-scale character sampling.
13. Carbonado An aggregate of many randomly oriented interlocking tiny diamond crystals that
is the toughest form of diamond.
, GIA Diamonds and Diamond grading EXAM LATEST VERSION NEWEST
ACTUAL EXAM COMPLETE 150 QUESTIONS AND CORRECT DETAILED
ANSWERS
14. Carbonate A class of chemical compounds that contain carbon and oxygen.
15. Catalyst A substance that increases the rate of a chemical reaction.
16. Cave mining An underground mining technique in which orebody is drilled beneath the
surface, loosened, and collected as it falls.
17. Central Selling Or- An agency designed to purchase, sort, evaluate, and sell rough diamonds.
ganisation (CSO)
18. Character sam- Testing for the size, shape, clarity, and color of the diamonds in a deposit.
pling
19. Characteristic col- The basic face-up color of a colored diamond.
or
20. Clarity character- Internal or external feature of a gemstone that helps determine its quality.
istic
21. Cleavage A smooth, flat break in a gemstone parallel to planes of atomic weakness.
22. Cleavage plane Plane parallel to a possible crystal face, where a diamond can split cleanly when
struck.
23. Cleaving Dividing a diamond into two or more pieces along a cleavage plane.
24. CLIPPIR dia- Cullinan-like, Large, Inclusion-Poor, Pure, Irregular, and Resorbed diamond.
monds
25. Color center A small defect in the atomic structure of a material that can absorb light and give
rise to a color. Structural defect that influences an object's absorption of light and
can cause its color.
26. Color lamellae Closely spaced grain lines where color concentrates.
, GIA Diamonds and Diamond grading EXAM LATEST VERSION NEWEST
ACTUAL EXAM COMPLETE 150 QUESTIONS AND CORRECT DETAILED
ANSWERS
27. Coning The process of forming the pavilion angle by gradually polishing ott the extra
material at ditterent angles.
28. Consignment A selection of goods loaned to a dealer by another wholesaler or a gem cutter.
29. Core Earth's innermost layer.
30. Cost-plus model Model in which final sale price is based on the cost to produce the product plus
a small markup.
31. Covalent bond A chemical bond formed by two atoms sharing electrons.
32. Craftsmanship The care that goes into the fashioning of a polished diamond, as confirmed by
its finish.
33. Cratons Ancient, large, and stable parts of the earth's continental crust.
34. Critical angle Angle between the normal and the maximum angle of refraction, which is the
largest angle at which rays inside the diamond can escape.
35. Crossed polariz- Two polarizers with their light-transmitting directions aligned perpendicularly so
ers light cannot transmit through them.
36. Crown angle The angle formed by the bezel facets and the girdle plane.
37. Crown height per- The distance from the girdle plane to the table, expressed as a percentage of
centage average girdle diameter.
38. Crust The surface and outermost layer of the earth.
39. Crustal diamond Rare diamond that forms in the continental crust or near the earth's surface due
to meteorite impact or tectonic plate collision.
40. Crystal planes Any set of parallel and evenly spaced planes distributed along certain crystal
directions in which atoms are most likely packed.
