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GIA DIAMONDS AND DIAMOND GRADING
FINAL NEWEST 2025 ACTUAL EXAM
COMPLETE 300 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
What is the specific gravity of gem-quality diamond? -
CORRECT ANSWER -3.52
Another name for the cubic crystal system is - CORRECT ANSWER-isometric
In diamonds, cleavage is caused by - CORRECT ANSWER-relatively wide spaces between some atomic planes.
The flashes of light and the contrasting dark areas you see when the diamond, the light, or the observer moves are called - CORRECT ANSWER-scintillation. 1 / 4
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The difference between the RI values of specific violet and red wavelengths of visible light for a given material is its - CORRECT ANSWER-dispersion
The higher the optical density of a material, the - CORRECT ANSWER -more it slows light down.
The angle of incidence always equals the - CORRECT ANSWER-angle of reflection.
Visible light is - CORRECT ANSWER-a form of radiant energy.
Variations in lighting and surroundings can affect a diamond's - CORRECT ANSWER-appearance
The appearance of a material's surface in reflected light is called - CORRECT ANSWER-luster
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Grease on the pavilion of a diamond results in - CORRECT ANSWER -more light leakage through the pavilion
White light is actually - CORRECT ANSWER-a combination of all the spectral colors.
The passage of light into or through a material is called - CORRECT ANSWER -transmission
In order to exit a diamond, light must strike an inner surface - CORRECT ANSWER-inside the critical angle
The flashes of color you see in a polished diamond are called - CORRECT ANSWER-fire
The relative size, arrangement, and contrast of bright and dark areas that result from a diamond's internal and external reflections is called - CORRECT ANSWER - pattern
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The change in speed and possible change in direction of light as it travels from one material to another is called - CORRECT ANSWER -refraction.
The combined effect of all the diamond's surface and internal white light reflections is its - CORRECT ANSWER-brightness
In the cutting sequence, the crown and pavilion mains are polished by the - CORRECT ANSWER-blocker
An early brilliant that has a circular girdle outline is called
- CORRECT ANSWER-an old european cut
The directional properties and structural features of a diamond crystal do not really matter in - CORRECT ANSWER-laser sawing
The cutting style with a flat bottom and a variable number of facets that come to a peak at the top is the - CORRECT ANSWER-rose cut
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