GIA Diamonds and Diamond Grading Final Exam
Questions and Correct Answers. Complete Verified
Solution 2024 2025 , A+ Graded , Success
Guaranteed
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?
Questions and Correct Answers. Complete Verified
Solution 2024 2025 , A+ Graded , Success
Guaranteed
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?
