1
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GIA Diamonds and Diamond Grading
Final Exam #2 Questions and Answers
(100% Correct Answers) Already Graded
A+
What group was critical to De Beers's early sales strategy?[ ANS:
]London Diamond Syndicate
© 2025 Assignment Expert
How are gem-quality rough diamonds sorted?[ ANS: ]Color
What generation was first to connect with diamonds as a
representation of lifetime commitment?[ ANS: ]Baby Boomers
Guru01 - Stuvia
Where did the diamond industry first start?[ ANS: ]India
What describes the concept of centrally controlled supply,
purchase, promotion, and sales of rough diamonds?[ ANS: ]Single-
channel marketing
What mantle layer is most dense?[ ANS: ]Lower mantle
What happens to diamond if lamproite stalls in the continental
crust?[ ANS: ]Will turn into graphite
When does subduction occur?[ ANS: ]When a continental and
oceanic plate collide
How are metamorphic rocks formed?[ ANS: ]High heat and high
pressure
What is an example of a superdeep diamond?[ ANS: ]CLIPPIR
diamonds, blue diamonds, Brazil's Junia diamond
, 2
For Expert help and assignment solutions, +254707240657
What might black spinel in a mineral sample indicate?[ ANS: ]A
good sign that a pipe is nearby
What equipment might offshore deep-sea diamond mining use?[
ANS: ]Robotic/automated crawlers
What deposit type produces most diamonds mined today?[ ANS:
]Primary deposits
What type of sampling gives an initial idea of diamond quality for
a deposit?[ ANS: ]Character sampling
© 2025 Assignment Expert
Where are rocks and geological structures similar to Africa found
due to ancient connections?[ ANS: ]Brazil
Guru01 - Stuvia
What is another term for crystal lattice?[ ANS: ]Crystal structure
What type are most natural diamonds?[ ANS: ]Type Ia
What is a smooth, flat break in a crystal parallel to a cleavage
plane?[ ANS: ]Cleavage
What is a flat, triangular, twinned diamond crystal?[ ANS: ]Macle
What types of point defects are found in diamonds?[ ANS:
]Intrinsic defect and extrinsic defects
What influences light absorption, resulting in bodycolor?[ ANS:
]Color center
What trace element can cause a violet color in diamonds?[ ANS:
]Hydrogen-related defects
How does the energy emitted by a gem compare to the energy it
absorbs?[ ANS: ]Lower
, 3
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What type of light combines all the colors in the visible spectrum?[
ANS: ]White light
What is the most common cause of yellow color in diamonds?[
ANS: ]Nitrogen defects
What controls light path length within a diamond?[ ANS: ]Cutting
What term describes a gemstone's surface in reflected light?[ ANS:
]Luster
© 2025 Assignment Expert
What describes the flashes of spectral colors seen in a polished
diamond?[ ANS: ]Fire
What was the main goal of research in developing the GIA Cut
Guru01 - Stuvia
Grading System?[ ANS: ]Determine which proportion
combinations create the most attractive light performance
What best describes the angle of incidence?[ ANS: ]Measured
btwn the normal and the reflected light
What process splits diamond rough along its cleavage plane?[
ANS: ]Cleaving
What do cutters evaluate to determine when to use a scaife for
coning?[ ANS: ]Strain
What made true round-shaped diamonds possible?[ ANS: ]Bruting
What was the prototype of the modern round brilliant cut?[ ANS:
]Old European cut
What does a dop do?[ ANS: ]Holds/secures a diamond in place
What does HPHT stand for?[ ANS: ]High pressure, high temperature
For Expert help and assignment solutions, +254707240657
GIA Diamonds and Diamond Grading
Final Exam #2 Questions and Answers
(100% Correct Answers) Already Graded
A+
What group was critical to De Beers's early sales strategy?[ ANS:
]London Diamond Syndicate
© 2025 Assignment Expert
How are gem-quality rough diamonds sorted?[ ANS: ]Color
What generation was first to connect with diamonds as a
representation of lifetime commitment?[ ANS: ]Baby Boomers
Guru01 - Stuvia
Where did the diamond industry first start?[ ANS: ]India
What describes the concept of centrally controlled supply,
purchase, promotion, and sales of rough diamonds?[ ANS: ]Single-
channel marketing
What mantle layer is most dense?[ ANS: ]Lower mantle
What happens to diamond if lamproite stalls in the continental
crust?[ ANS: ]Will turn into graphite
When does subduction occur?[ ANS: ]When a continental and
oceanic plate collide
How are metamorphic rocks formed?[ ANS: ]High heat and high
pressure
What is an example of a superdeep diamond?[ ANS: ]CLIPPIR
diamonds, blue diamonds, Brazil's Junia diamond
, 2
For Expert help and assignment solutions, +254707240657
What might black spinel in a mineral sample indicate?[ ANS: ]A
good sign that a pipe is nearby
What equipment might offshore deep-sea diamond mining use?[
ANS: ]Robotic/automated crawlers
What deposit type produces most diamonds mined today?[ ANS:
]Primary deposits
What type of sampling gives an initial idea of diamond quality for
a deposit?[ ANS: ]Character sampling
© 2025 Assignment Expert
Where are rocks and geological structures similar to Africa found
due to ancient connections?[ ANS: ]Brazil
Guru01 - Stuvia
What is another term for crystal lattice?[ ANS: ]Crystal structure
What type are most natural diamonds?[ ANS: ]Type Ia
What is a smooth, flat break in a crystal parallel to a cleavage
plane?[ ANS: ]Cleavage
What is a flat, triangular, twinned diamond crystal?[ ANS: ]Macle
What types of point defects are found in diamonds?[ ANS:
]Intrinsic defect and extrinsic defects
What influences light absorption, resulting in bodycolor?[ ANS:
]Color center
What trace element can cause a violet color in diamonds?[ ANS:
]Hydrogen-related defects
How does the energy emitted by a gem compare to the energy it
absorbs?[ ANS: ]Lower
, 3
For Expert help and assignment solutions, +254707240657
What type of light combines all the colors in the visible spectrum?[
ANS: ]White light
What is the most common cause of yellow color in diamonds?[
ANS: ]Nitrogen defects
What controls light path length within a diamond?[ ANS: ]Cutting
What term describes a gemstone's surface in reflected light?[ ANS:
]Luster
© 2025 Assignment Expert
What describes the flashes of spectral colors seen in a polished
diamond?[ ANS: ]Fire
What was the main goal of research in developing the GIA Cut
Guru01 - Stuvia
Grading System?[ ANS: ]Determine which proportion
combinations create the most attractive light performance
What best describes the angle of incidence?[ ANS: ]Measured
btwn the normal and the reflected light
What process splits diamond rough along its cleavage plane?[
ANS: ]Cleaving
What do cutters evaluate to determine when to use a scaife for
coning?[ ANS: ]Strain
What made true round-shaped diamonds possible?[ ANS: ]Bruting
What was the prototype of the modern round brilliant cut?[ ANS:
]Old European cut
What does a dop do?[ ANS: ]Holds/secures a diamond in place
What does HPHT stand for?[ ANS: ]High pressure, high temperature
