GIA Diamonds and Diamond Grading Final Exam
| Newest Questions and Answers | 2026 Update |
Expert Verified
• Beneficiation . CORRECT ANSWER: A commitment to reserve a portion of the
resources derived from any country for the economic development of that
country.
• Blemish . CORRECT ANSWER: Clarity characteristic that's confined to the
surface of a polished gemstone. Characteristic or irregularity confined to the
surface of a polished gemstone.
• Blockchain . CORRECT ANSWER: A shared, unalterable ledger used to record
transactions and track assets through a supply chain or business network.
• Blocking . CORRECT ANSWER: Placing the first 17 or 18 facets on a diamond,
including the crown and pavilion main facets, table, and sometimes a culet.
• Bort . CORRECT ANSWER: A form of industrial-grade diamond that usually
occurs as very included single crystals in a range of yellows, grays, and browns.
• Bow-tie . CORRECT ANSWER: A dark area across the center of an elongated
brilliant cut.
• Brightfield illumination . CORRECT ANSWER: Lighting a diamondfrom below to
create a bright background.
,• Brightness . CORRECT ANSWER: The effect of all the diamond's internal and
external reflections of white light.
• Brilliant cut . CORRECT ANSWER: Cutting style with triangular or kite-shaped
facets that radiate from the center toward the girdle.
• Brillianteering . CORRECT ANSWER: Placement and polishing of the star and
upper and lower girdle facets.
• Bruting . CORRECT ANSWER: Forming the basic face-up outline of a round or
rounded shape diamond to prepare it for faceting.
• Bulk sampling . CORRECT ANSWER: Large-scale character sampling.
• Carbonado . CORRECT ANSWER: An aggregate of many randomly oriented
interlocking tiny diamond crystals that is the toughest form of diamond.
• Carbonate . CORRECT ANSWER: A class of chemical compounds that contain
carbon and oxygen.
• Catalyst . CORRECT ANSWER: A substance that increases the rate of a chemical
reaction.
• Cave mining . CORRECT ANSWER: An underground mining technique in which
orebody is drilled beneath the surface, loosened, and collected as it falls.
, • Central Selling Organisation (CSO) . CORRECT ANSWER: An agency designed to
purchase, sort, evaluate, and sell rough diamonds.
• Character sampling . CORRECT ANSWER: Testing for the size, shape, clarity, and
color of the diamonds in a deposit.
• Characteristic color . CORRECT ANSWER: The basic face-up color of a colored
diamond.
• Clarity characteristic . CORRECT ANSWER: Internal or external feature of a
gemstone that helps determine its quality.
• Cleavage . CORRECT ANSWER: A smooth, flat break in a gemstone parallel to
planes of atomic weakness.
• Cleavage plane . CORRECT ANSWER: Plane parallel to a possible crystal face,
where a diamond can split cleanly when struck.
• Cleaving . CORRECT ANSWER: Dividing a diamond into two or more pieces along
a cleavage plane.
• CLIPPIR diamonds . CORRECT ANSWER: Cullinan-like, Large, Inclusion-Poor,
Pure, Irregular, and Resorbed diamond.
• Color center . CORRECT ANSWER: 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.
| Newest Questions and Answers | 2026 Update |
Expert Verified
• Beneficiation . CORRECT ANSWER: A commitment to reserve a portion of the
resources derived from any country for the economic development of that
country.
• Blemish . CORRECT ANSWER: Clarity characteristic that's confined to the
surface of a polished gemstone. Characteristic or irregularity confined to the
surface of a polished gemstone.
• Blockchain . CORRECT ANSWER: A shared, unalterable ledger used to record
transactions and track assets through a supply chain or business network.
• Blocking . CORRECT ANSWER: Placing the first 17 or 18 facets on a diamond,
including the crown and pavilion main facets, table, and sometimes a culet.
• Bort . CORRECT ANSWER: A form of industrial-grade diamond that usually
occurs as very included single crystals in a range of yellows, grays, and browns.
• Bow-tie . CORRECT ANSWER: A dark area across the center of an elongated
brilliant cut.
• Brightfield illumination . CORRECT ANSWER: Lighting a diamondfrom below to
create a bright background.
,• Brightness . CORRECT ANSWER: The effect of all the diamond's internal and
external reflections of white light.
• Brilliant cut . CORRECT ANSWER: Cutting style with triangular or kite-shaped
facets that radiate from the center toward the girdle.
• Brillianteering . CORRECT ANSWER: Placement and polishing of the star and
upper and lower girdle facets.
• Bruting . CORRECT ANSWER: Forming the basic face-up outline of a round or
rounded shape diamond to prepare it for faceting.
• Bulk sampling . CORRECT ANSWER: Large-scale character sampling.
• Carbonado . CORRECT ANSWER: An aggregate of many randomly oriented
interlocking tiny diamond crystals that is the toughest form of diamond.
• Carbonate . CORRECT ANSWER: A class of chemical compounds that contain
carbon and oxygen.
• Catalyst . CORRECT ANSWER: A substance that increases the rate of a chemical
reaction.
• Cave mining . CORRECT ANSWER: An underground mining technique in which
orebody is drilled beneath the surface, loosened, and collected as it falls.
, • Central Selling Organisation (CSO) . CORRECT ANSWER: An agency designed to
purchase, sort, evaluate, and sell rough diamonds.
• Character sampling . CORRECT ANSWER: Testing for the size, shape, clarity, and
color of the diamonds in a deposit.
• Characteristic color . CORRECT ANSWER: The basic face-up color of a colored
diamond.
• Clarity characteristic . CORRECT ANSWER: Internal or external feature of a
gemstone that helps determine its quality.
• Cleavage . CORRECT ANSWER: A smooth, flat break in a gemstone parallel to
planes of atomic weakness.
• Cleavage plane . CORRECT ANSWER: Plane parallel to a possible crystal face,
where a diamond can split cleanly when struck.
• Cleaving . CORRECT ANSWER: Dividing a diamond into two or more pieces along
a cleavage plane.
• CLIPPIR diamonds . CORRECT ANSWER: Cullinan-like, Large, Inclusion-Poor,
Pure, Irregular, and Resorbed diamond.
• Color center . CORRECT ANSWER: 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.
