GIA DIAMOND AND DIAMOND GRADING FINAL EXAM 2024
ACTUAL EXAM COMPLETE 200 QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS ) // ALREADY
GRADED A+ // BRAND NEW!!
What group was critical to De Beers's early sales strategy? - ANSWER: London
Diamond Syndicate
How are gem-quality rough diamonds sorted? - ANSWER: Color
What generation was first to connect with diamonds as a representation of lifetime
commitment? - ANSWER: Baby Boomers
Where did the diamond industry first start? - ANSWER: India
What describes the concept of centrally controlled supply, purchase, promotion, and
sales of rough diamonds? - ANSWER: Single-channel marketing
What mantle layer is most dense? - ANSWER: Lower mantle
What happens to diamond if lamproite stalls in the continental crust? - ANSWER:
Will turn into graphite
When does subduction occur? - ANSWER: When a continental and oceanic plate
collide
How are metamorphic rocks formed? - ANSWER: High heat and high pressure
What is an example of a superdeep diamond? - ANSWER: CLIPPIR diamonds, blue
diamonds, Brazil's Junia diamond
What might black spinel in a mineral sample indicate? - ANSWER: A good sign that a
pipe is nearby
What equipment might offshore deep-sea diamond mining use? - ANSWER:
Robotic/automated crawlers
What deposit type produces most diamonds mined today? - ANSWER: Primary
deposits
What type of sampling gives an initial idea of diamond quality for a deposit? -
ANSWER: Character sampling
Where are rocks and geological structures similar to Africa found due to ancient
connections? - ANSWER: Brazil
, What is another term for crystal lattice? - ANSWER: Crystal structure
What type are most natural diamonds? - ANSWER: Type Ia
What is a smooth, flat break in a crystal parallel to a cleavage plane? - ANSWER:
Cleavage
What is a flat, triangular, twinned diamond crystal? - ANSWER: Macle
What types of point defects are found in diamonds? - ANSWER: Intrinsic defect and
extrinsic defects
What influences light absorption, resulting in bodycolor? - ANSWER: Color center
What trace element can cause a violet color in diamonds? - ANSWER: Hydrogen-
related defects
How does the energy emitted by a gem compare to the energy it absorbs? -
ANSWER: Lower
What type of light combines all the colors in the visible spectrum? - ANSWER: White
light
What is the most common cause of yellow color in diamonds? - ANSWER: Nitrogen
defects
What controls light path length within a diamond? - ANSWER: Cutting
What term describes a gemstone's surface in reflected light? - ANSWER: Luster
What describes the flashes of spectral colors seen in a polished diamond? - ANSWER:
Fire
What was the main goal of research in developing the GIA Cut Grading System? -
ANSWER: Determine which proportion combinations create the most attractive light
performance
What best describes the angle of incidence? - ANSWER: Measured btwn the normal
and the reflected light
What process splits diamond rough along its cleavage plane? - ANSWER: Cleaving
What do cutters evaluate to determine when to use a scaife for coning? - ANSWER:
Strain
What made true round-shaped diamonds possible? - ANSWER: Bruting
ACTUAL EXAM COMPLETE 200 QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS ) // ALREADY
GRADED A+ // BRAND NEW!!
What group was critical to De Beers's early sales strategy? - ANSWER: London
Diamond Syndicate
How are gem-quality rough diamonds sorted? - ANSWER: Color
What generation was first to connect with diamonds as a representation of lifetime
commitment? - ANSWER: Baby Boomers
Where did the diamond industry first start? - ANSWER: India
What describes the concept of centrally controlled supply, purchase, promotion, and
sales of rough diamonds? - ANSWER: Single-channel marketing
What mantle layer is most dense? - ANSWER: Lower mantle
What happens to diamond if lamproite stalls in the continental crust? - ANSWER:
Will turn into graphite
When does subduction occur? - ANSWER: When a continental and oceanic plate
collide
How are metamorphic rocks formed? - ANSWER: High heat and high pressure
What is an example of a superdeep diamond? - ANSWER: CLIPPIR diamonds, blue
diamonds, Brazil's Junia diamond
What might black spinel in a mineral sample indicate? - ANSWER: A good sign that a
pipe is nearby
What equipment might offshore deep-sea diamond mining use? - ANSWER:
Robotic/automated crawlers
What deposit type produces most diamonds mined today? - ANSWER: Primary
deposits
What type of sampling gives an initial idea of diamond quality for a deposit? -
ANSWER: Character sampling
Where are rocks and geological structures similar to Africa found due to ancient
connections? - ANSWER: Brazil
, What is another term for crystal lattice? - ANSWER: Crystal structure
What type are most natural diamonds? - ANSWER: Type Ia
What is a smooth, flat break in a crystal parallel to a cleavage plane? - ANSWER:
Cleavage
What is a flat, triangular, twinned diamond crystal? - ANSWER: Macle
What types of point defects are found in diamonds? - ANSWER: Intrinsic defect and
extrinsic defects
What influences light absorption, resulting in bodycolor? - ANSWER: Color center
What trace element can cause a violet color in diamonds? - ANSWER: Hydrogen-
related defects
How does the energy emitted by a gem compare to the energy it absorbs? -
ANSWER: Lower
What type of light combines all the colors in the visible spectrum? - ANSWER: White
light
What is the most common cause of yellow color in diamonds? - ANSWER: Nitrogen
defects
What controls light path length within a diamond? - ANSWER: Cutting
What term describes a gemstone's surface in reflected light? - ANSWER: Luster
What describes the flashes of spectral colors seen in a polished diamond? - ANSWER:
Fire
What was the main goal of research in developing the GIA Cut Grading System? -
ANSWER: Determine which proportion combinations create the most attractive light
performance
What best describes the angle of incidence? - ANSWER: Measured btwn the normal
and the reflected light
What process splits diamond rough along its cleavage plane? - ANSWER: Cleaving
What do cutters evaluate to determine when to use a scaife for coning? - ANSWER:
Strain
What made true round-shaped diamonds possible? - ANSWER: Bruting
