GIA FINAL EXAM, DIAMOND GRADING
EXAM, GIA DIAMONDS T EST,
GEMOLOGY QUESTIONS A ND ANSWERS,
DIAMOND QUALITY ASSE SSMENT, GIA
GRADING STANDARDS, G EMOLOGICAL
EXAM
Question :What group was critical to De Beers's early sales
strategy?
Correct Answer:London Diamond Syndicate
Question :How are gem-quality rough diamonds sorted?
Correct Answer:Color
Question :What generation was first to connect with
diamonds as a representation of lifetime commitment?
Correct Answer:Baby Boomers
Question :Where did the diamond industry first start?
Correct Answer:India
Question :What describes the concept of centrally controlled
supply, purchase, promotion, and sales of rough diamonds?
Correct Answer:Single-channel marketing
Question :What mantle layer is most dense?
Correct Answer:Lower mantle
Question :What happens to diamond if lamproite stalls in the
continental crust?
Correct Answer:Will turn into graphite
Question :When does subduction occur?
Correct Answer:When a continental and oceanic plate
collide
Question :How are metamorphic rocks formed?
Correct Answer:High heat and high pressure
Question :What is an example of a superdeep diamond?
Correct Answer:CLIPPIR diamonds, blue diamonds,
Brazil's Junia diamond
Question :What might black spinel in a mineral sample
indicate?
Correct Answer:A good sign that a pipe is nearby
Question :What equipment might offshore deep-sea diamond
mining use?
Correct Answer:Robotic/automated crawlers
Question :What deposit type produces most diamonds mined
today?
Correct Answer:Primary deposits
Question :What type of sampling gives an initial idea of
diamond quality for a deposit?
Correct Answer:Character sampling
Question :Where are rocks and geological structures similar
to Africa found due to ancient connections?
Correct Answer:Brazil
Question :What is another term for crystal lattice?
Correct Answer:Crystal structure
Question :What type are most natural diamonds?
Correct Answer:Type Ia
Question :What is a smooth, flat break in a crystal parallel to
a cleavage plane?
Correct Answer:Cleavage
Question :What is a flat, triangular, twinned diamond crystal?
Correct Answer:Macle
Question :What types of point defects are found in
diamonds?
Correct Answer:Intrinsic defect and extrinsic defects
Question :What influences light absorption, resulting in
bodycolor?
Correct Answer:Color center
Question :What trace element can cause a violet color in
diamonds?
Correct Answer:Hydrogen-related defects
Question :How does the energy emitted by a gem compare to
the energy it absorbs?
Correct Answer:Lower
Question :What type of light combines all the colors in the
visible spectrum?
Correct Answer:White light
Question :What is the most common cause of yellow color in
diamonds?
