GIA Diamonds and Diamond Grading
Final Exam 2 Questions and
Answers20
London Diamond Syndicate - ANSWERS-What group was critical to De Beers's early sales
strategy?
Color - ANSWERS-How are gem-quality rough diamonds sorted?
Baby Boomers - ANSWERS-What generation was first to connect with diamonds as a
representation of lifetime commitment?
India - ANSWERS-Where did the diamond industry first start?
Single-channel marketing - ANSWERS-What describes the concept of centrally controlled supply,
purchase, promotion, and sales of rough diamonds?
Lower mantle - ANSWERS-What mantle layer is most dense?
Will turn into graphite - ANSWERS-What happens to diamond if lamproite stalls in the
continental crust?
When a continental and oceanic plate collide - ANSWERS-When does subduction occur?
High heat and high pressure - ANSWERS-How are metamorphic rocks formed?
,CLIPPIR diamonds, blue diamonds, Brazil's Junia diamond - ANSWERS-What is an example of a
superdeep diamond?
A good sign that a pipe is nearby - ANSWERS-What might black spinel in a mineral sample
indicate?
Robotic/automated crawlers - ANSWERS-What equipment might offshore deep-sea diamond
mining use?
Primary deposits - ANSWERS-What deposit type produces most diamonds mined today?
Character sampling - ANSWERS-What type of sampling gives an initial idea of diamond quality
for a deposit?
Brazil - ANSWERS-Where are rocks and geological structures similar to Africa found due to
ancient connections?
Crystal structure - ANSWERS-What is another term for crystal lattice?
Type Ia - ANSWERS-What type are most natural diamonds?
Cleavage - ANSWERS-What is a smooth, flat break in a crystal parallel to a cleavage plane?
Macle - ANSWERS-What is a flat, triangular, twinned diamond crystal?
Intrinsic defect and extrinsic defects - ANSWERS-What types of point defects are found in
diamonds?
, Color center - ANSWERS-What influences light absorption, resulting in bodycolor?
Hydrogen-related defects - ANSWERS-What trace element can cause a violet color in diamonds?
Lower - ANSWERS-How does the energy emitted by a gem compare to the energy it absorbs?
White light - ANSWERS-What type of light combines all the colors in the visible spectrum?
Nitrogen defects - ANSWERS-What is the most common cause of yellow color in diamonds?
Cutting - ANSWERS-What controls light path length within a diamond?
Luster - ANSWERS-What term describes a gemstone's surface in reflected light?
Fire - ANSWERS-What describes the flashes of spectral colors seen in a polished diamond?
Determine which proportion combinations create the most attractive light performance -
ANSWERS-What was the main goal of research in developing the GIA Cut Grading System?
Measured btwn the normal and the reflected light - ANSWERS-What best describes the angle of
incidence?
Cleaving - ANSWERS-What process splits diamond rough along its cleavage plane?
Strain - ANSWERS-What do cutters evaluate to determine when to use a scaife for coning?
Bruting - ANSWERS-What made true round-shaped diamonds possible?
Final Exam 2 Questions and
Answers20
London Diamond Syndicate - ANSWERS-What group was critical to De Beers's early sales
strategy?
Color - ANSWERS-How are gem-quality rough diamonds sorted?
Baby Boomers - ANSWERS-What generation was first to connect with diamonds as a
representation of lifetime commitment?
India - ANSWERS-Where did the diamond industry first start?
Single-channel marketing - ANSWERS-What describes the concept of centrally controlled supply,
purchase, promotion, and sales of rough diamonds?
Lower mantle - ANSWERS-What mantle layer is most dense?
Will turn into graphite - ANSWERS-What happens to diamond if lamproite stalls in the
continental crust?
When a continental and oceanic plate collide - ANSWERS-When does subduction occur?
High heat and high pressure - ANSWERS-How are metamorphic rocks formed?
,CLIPPIR diamonds, blue diamonds, Brazil's Junia diamond - ANSWERS-What is an example of a
superdeep diamond?
A good sign that a pipe is nearby - ANSWERS-What might black spinel in a mineral sample
indicate?
Robotic/automated crawlers - ANSWERS-What equipment might offshore deep-sea diamond
mining use?
Primary deposits - ANSWERS-What deposit type produces most diamonds mined today?
Character sampling - ANSWERS-What type of sampling gives an initial idea of diamond quality
for a deposit?
Brazil - ANSWERS-Where are rocks and geological structures similar to Africa found due to
ancient connections?
Crystal structure - ANSWERS-What is another term for crystal lattice?
Type Ia - ANSWERS-What type are most natural diamonds?
Cleavage - ANSWERS-What is a smooth, flat break in a crystal parallel to a cleavage plane?
Macle - ANSWERS-What is a flat, triangular, twinned diamond crystal?
Intrinsic defect and extrinsic defects - ANSWERS-What types of point defects are found in
diamonds?
, Color center - ANSWERS-What influences light absorption, resulting in bodycolor?
Hydrogen-related defects - ANSWERS-What trace element can cause a violet color in diamonds?
Lower - ANSWERS-How does the energy emitted by a gem compare to the energy it absorbs?
White light - ANSWERS-What type of light combines all the colors in the visible spectrum?
Nitrogen defects - ANSWERS-What is the most common cause of yellow color in diamonds?
Cutting - ANSWERS-What controls light path length within a diamond?
Luster - ANSWERS-What term describes a gemstone's surface in reflected light?
Fire - ANSWERS-What describes the flashes of spectral colors seen in a polished diamond?
Determine which proportion combinations create the most attractive light performance -
ANSWERS-What was the main goal of research in developing the GIA Cut Grading System?
Measured btwn the normal and the reflected light - ANSWERS-What best describes the angle of
incidence?
Cleaving - ANSWERS-What process splits diamond rough along its cleavage plane?
Strain - ANSWERS-What do cutters evaluate to determine when to use a scaife for coning?
Bruting - ANSWERS-What made true round-shaped diamonds possible?
