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Diamond & Diamond Grading Exam Questions and Answers (Latest Update 2025)
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Diamond & Diamond Grading Exam Questions and Answers (Latest Update 2025)
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Diamond & Diamond Grading ExamQuestions and Answers (Latest Update
2025)
A series of minute nicks along the facet junctions of a
fashioned diamond; gives the edges a white or fuzzy
appearance. (Assignment 10) - Correct Answer ✅ Abrasion
(Abr)
The highest degree of luster possible in a transparent
material. (Assignment 8) - Correct Answer ✅ Adamantine
luster
A solid mass of individual, randomly oriented crystals,
intergrown or held together by a natural binding agent.
(Assignment 7) - Correct Answer ✅ Aggregate
A deposit where gems are eroded from their source rock, then
transported away from the source and further concentrated.
(Assignment 5) - Correct Answer ✅ Alluvial deposit
The angle at which a ray of light strikes a surface, measured
from the normal. (Assignment 8) - Correct Answer ✅ Angle
of incidence
,Diamond & Diamond Grading Exam
Questions and Answers (Latest Update
2025)
The angle between the normal and a reflected ray of light.
(Assignment 8) - Correct Answer ✅ Angle of reflection
Using heat to stabilize irradiated color in gemstones.
(Assignment 12) - Correct Answer ✅ Annealing
An estimation of the value of an article, usually for insurance
purposes. (Assignment 1) - Correct Answer ✅ Appraisal
The result achieved by adding the smallest and largest girdle
measurements of a round brilliant and dividing by two.
(Assignment 14) - Correct Answer ✅ Average girdle
diameter
Frosted rough diamond. "Bark" in Dutch. (Assignment 9) -
Correct Answer ✅ Bast
,Diamond & Diamond Grading Exam
Questions and Answers (Latest Update
2025)
Very small feathers that extend from the girdle surface into
the stone; can result from the cutting process. (Assignment
10) - Correct Answer ✅ Bearded Girdle (BG)
The slightly curving center of the long side of a pear,
marquise, heart, or oval. (Assignment 16) - Correct Answer
✅ Belly
A commitment to reserve a portion of the resources derived
from any country for the economic development of that
country. (Assignment 3) - Correct Answer ✅ Beneficiation
De Beers' formalized commitment of itself and its
sightholders to the highest ethical standards. (Assignment 3)
- Correct Answer ✅ Best Practices Principles (BPP)
Clarity characteristic that's confined to the surface of a
polished gemstone. (Assignment 10) - Correct Answer ✅
Blemish
, Diamond & Diamond Grading Exam
Questions and Answers (Latest Update
2025)
Underground mining that involves building a concrete-lined
tunnel under an ore deposit, then collecting the ore through
openings in the liner. (Assignment 6) - Correct Answer ✅
Block caving
Placing the first 17 or 18 facets on a diamond. (Assignment 9)
- Correct Answer ✅ Blocking
A dark area across the center of an elongated brilliant cut.
(Assignment 16) - Correct Answer ✅ Bow-tie
A traditional store consisting of walls and a fixed location.
(Assignment 3) - Correct Answer ✅ Brick-and-mortar
retailer
The effect of all the diamond's internal and external
reflections of white light. (Assignment 8) - Correct Answer
✅ Brightness
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