GIA Diamond and Diamond Grading
550+ Actual Exam Questions With Reviewed
100% Correct Detailed Answers
Guaranteed Pass!!
1. The diamond term glassie refers to... - ANSWER A well-formed
octahedral crystal
2. A naturally occurring, inorganic substance with a characteristic chemical
composition and usually a characteristic crystal structure is known as a... -
ANSWER Mineral
3. The habit of gem-quality diamond is the... - ANSWER Octahedron
4. Another name for the cubic crystal system is... - ANSWER Isometric
5. In diamonds, cleavage is caused by... - ANSWER Relatively wide spaces
between some atomic planes
6. A flat, triangular twinned diamond crystal is called a... - ANSWER Macle
7. The strongest of all atomic bonds are called... - ANSWER Covalent
,8. Solid matter with atoms arranged in a regular, repeating pattern is called
a(n)... - ANSWER Crystal
9. The smallest group of atoms with a characteristic chemical composition and
the basic crystal structure of a mineral is called a(n)... - ANSWER Unit
cell
10.What is the specific gravity of gem-quality diamond? - ANSWER 3.52
11.Atoms in a gem that aren't part of its essential chemical composition are
called... - ANSWER Trace elements
12.The relative size, arrangement, and contrast of bright and dark areas that
result from a diamond's internal and external reflections is called... -
ANSWER Pattern
13.The flashes of colour you see in a polished diamond are called... - ANSWER
Fire
14.Variations in lightning and surroundings can affect a diamond's... - ANSWER
Appearance
15.Visible light is... - ANSWER A form of radiant energy
,16.White light is actually... - ANSWER A combination of all the spectral
colours
17.The passage of light into or through a material is called... - ANSWER
Transmission
18.The higher the optical density of a material, the... - ANSWER More it
slows down light
19.The change in speed and possible change in direction of light as it travels
from one material to another is called... - ANSWER Refraction
20.In order to exit a diamond, light must strike an inner surface... - ANSWER
Inside the critical angle
21.The flashes of light and the contrasting dark areas you see when the
diamond, the light, or the observer moves are called... - ANSWER
Scintillation
22.The appearance of a material's surface in reflected light is called... -
ANSWER Luster
23.Grease on the pavilion of diamond results in... - ANSWER More light
leakage from the pavilion
, 24.The difference between the RI values of specific violet and red wavelengths
of visible light for a given material is its... - ANSWER Dispersion
25.The angle of incidence always equals the... - ANSWER Angle of
reflection
26.The combined effect of all the diamond's surface and internal white light
reflections is its... - ANSWER Brightness
27.The size of a finished gem depends greatly upon the rough diamond's... -
ANSWER Shape
28.A notch scratched into diamond rough to prepare it for cleaving is called a...
- ANSWER Kerf
29.The number of facets on a single-cut diamond is... - ANSWER 17 or 18
30.An early brilliant that has a circular girdle outline is called... - ANSWER
An old European cut
31.The devices that grip and hold a diamond for polishing are known as the... -
ANSWER Dop and tang
32.The cutting style with a flat bottom and a variable number of facets that
come to a peak at the top is the... - ANSWER Rose cut
550+ Actual Exam Questions With Reviewed
100% Correct Detailed Answers
Guaranteed Pass!!
1. The diamond term glassie refers to... - ANSWER A well-formed
octahedral crystal
2. A naturally occurring, inorganic substance with a characteristic chemical
composition and usually a characteristic crystal structure is known as a... -
ANSWER Mineral
3. The habit of gem-quality diamond is the... - ANSWER Octahedron
4. Another name for the cubic crystal system is... - ANSWER Isometric
5. In diamonds, cleavage is caused by... - ANSWER Relatively wide spaces
between some atomic planes
6. A flat, triangular twinned diamond crystal is called a... - ANSWER Macle
7. The strongest of all atomic bonds are called... - ANSWER Covalent
,8. Solid matter with atoms arranged in a regular, repeating pattern is called
a(n)... - ANSWER Crystal
9. The smallest group of atoms with a characteristic chemical composition and
the basic crystal structure of a mineral is called a(n)... - ANSWER Unit
cell
10.What is the specific gravity of gem-quality diamond? - ANSWER 3.52
11.Atoms in a gem that aren't part of its essential chemical composition are
called... - ANSWER Trace elements
12.The relative size, arrangement, and contrast of bright and dark areas that
result from a diamond's internal and external reflections is called... -
ANSWER Pattern
13.The flashes of colour you see in a polished diamond are called... - ANSWER
Fire
14.Variations in lightning and surroundings can affect a diamond's... - ANSWER
Appearance
15.Visible light is... - ANSWER A form of radiant energy
,16.White light is actually... - ANSWER A combination of all the spectral
colours
17.The passage of light into or through a material is called... - ANSWER
Transmission
18.The higher the optical density of a material, the... - ANSWER More it
slows down light
19.The change in speed and possible change in direction of light as it travels
from one material to another is called... - ANSWER Refraction
20.In order to exit a diamond, light must strike an inner surface... - ANSWER
Inside the critical angle
21.The flashes of light and the contrasting dark areas you see when the
diamond, the light, or the observer moves are called... - ANSWER
Scintillation
22.The appearance of a material's surface in reflected light is called... -
ANSWER Luster
23.Grease on the pavilion of diamond results in... - ANSWER More light
leakage from the pavilion
, 24.The difference between the RI values of specific violet and red wavelengths
of visible light for a given material is its... - ANSWER Dispersion
25.The angle of incidence always equals the... - ANSWER Angle of
reflection
26.The combined effect of all the diamond's surface and internal white light
reflections is its... - ANSWER Brightness
27.The size of a finished gem depends greatly upon the rough diamond's... -
ANSWER Shape
28.A notch scratched into diamond rough to prepare it for cleaving is called a...
- ANSWER Kerf
29.The number of facets on a single-cut diamond is... - ANSWER 17 or 18
30.An early brilliant that has a circular girdle outline is called... - ANSWER
An old European cut
31.The devices that grip and hold a diamond for polishing are known as the... -
ANSWER Dop and tang
32.The cutting style with a flat bottom and a variable number of facets that
come to a peak at the top is the... - ANSWER Rose cut
