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