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!!
How are gem-quality rough diamonds sorted? - ANSWER: weight, shape, clarity, and
color
What is a downstream segment of the mine to market diamond journey? - ANSWER:
Selling to a customer via diamond jewelry retail
What describes a larger organization buying and joining smaller companies? -
ANSWER: Consolidation
What region was the heart of the diamond rush in South Africa? - ANSWER: Kimberly
What diamond's discovery led to the modern diamond industry? - ANSWER: The
Dudley- star of South Africa
What is characteristic of minerals? - ANSWER: Natural inorganic substance with
chemical composition and characteristic structure
What layer is molten? - ANSWER: Outer core
Where are most diamond deposits found? - ANSWER: Cratons
Where do most diamonds form and reside? - ANSWER: Within the mantel keel under
cratons
What is an example of a superdeep diamond? - ANSWER: Juina
What kind of rock creates a primary diamond deposit? - ANSWER: Kimberlite
How do geologists locate cratons? - ANSWER: geological mapping
How does ore removal start in a primary deposit? - ANSWER: Open-pit mining
What might perovskite in a mineral sample indicate? - ANSWER: A diamond
pipe/source deposit is nearby
What is the rock that covers a pipe? - ANSWER: overburden - also called yellow
ground due to yellow color
Which subatomic particle has no electrical charge? - ANSWER: Neutron
, What can the diamond type classification system help to identify? - ANSWER: Lab-
grown diamonds
What is another name for the cubic system? - ANSWER: Isometric
What is the surface in a twinned crystal where the diamond's growth direction
changes? - ANSWER: Twinning plane
What is a rough diamond's value based on? - ANSWER: Facet gem potential
What type of radiant energy is found on the electromagnetic spectrum? - ANSWER:
X-ray
What causes steps in a diamond's band gap? - ANSWER: A constant energy
differences. How much energy an electron requires to move across the gap
What do electrons do when visible light is emitted during luminescence? - ANSWER:
Return to stable state
What subatomic particles interact with light to produce color? - ANSWER: Electrons
What does irradiation create when it displaces carbon atoms in the crystal lattice? -
ANSWER: Vacancies
What is refraction? - ANSWER: The change in speed and possible change in direction
of light as it travels from one material to another
What is fire in a polished diamond? - ANSWER: Dispersion
What is a key component of cut quality in a polished diamond? - ANSWER:
Proportion
What is essential for consistent diamond cut grading? - ANSWER: Spot and diffused
fluorescent lighting
What happens to light rays outside the critical angle cone? - ANSWER: Reflect
interally
What did cutters apply the modern brilliant cut to fancy shapes? - ANSWER: to
maximize profit from oddly shaped or off color
How does laser sawing increase weight retention? - ANSWER: They are
computerized, so they are quicker and more precise. "Pie or Scoop sawing". That will
save the weight retention
What early cut introduced the culet? - ANSWER: table cut
ACTUAL EXAM COMPLETE 200 QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS ) // ALREADY
GRADED A+ // BRAND NEW!!
How are gem-quality rough diamonds sorted? - ANSWER: weight, shape, clarity, and
color
What is a downstream segment of the mine to market diamond journey? - ANSWER:
Selling to a customer via diamond jewelry retail
What describes a larger organization buying and joining smaller companies? -
ANSWER: Consolidation
What region was the heart of the diamond rush in South Africa? - ANSWER: Kimberly
What diamond's discovery led to the modern diamond industry? - ANSWER: The
Dudley- star of South Africa
What is characteristic of minerals? - ANSWER: Natural inorganic substance with
chemical composition and characteristic structure
What layer is molten? - ANSWER: Outer core
Where are most diamond deposits found? - ANSWER: Cratons
Where do most diamonds form and reside? - ANSWER: Within the mantel keel under
cratons
What is an example of a superdeep diamond? - ANSWER: Juina
What kind of rock creates a primary diamond deposit? - ANSWER: Kimberlite
How do geologists locate cratons? - ANSWER: geological mapping
How does ore removal start in a primary deposit? - ANSWER: Open-pit mining
What might perovskite in a mineral sample indicate? - ANSWER: A diamond
pipe/source deposit is nearby
What is the rock that covers a pipe? - ANSWER: overburden - also called yellow
ground due to yellow color
Which subatomic particle has no electrical charge? - ANSWER: Neutron
, What can the diamond type classification system help to identify? - ANSWER: Lab-
grown diamonds
What is another name for the cubic system? - ANSWER: Isometric
What is the surface in a twinned crystal where the diamond's growth direction
changes? - ANSWER: Twinning plane
What is a rough diamond's value based on? - ANSWER: Facet gem potential
What type of radiant energy is found on the electromagnetic spectrum? - ANSWER:
X-ray
What causes steps in a diamond's band gap? - ANSWER: A constant energy
differences. How much energy an electron requires to move across the gap
What do electrons do when visible light is emitted during luminescence? - ANSWER:
Return to stable state
What subatomic particles interact with light to produce color? - ANSWER: Electrons
What does irradiation create when it displaces carbon atoms in the crystal lattice? -
ANSWER: Vacancies
What is refraction? - ANSWER: The change in speed and possible change in direction
of light as it travels from one material to another
What is fire in a polished diamond? - ANSWER: Dispersion
What is a key component of cut quality in a polished diamond? - ANSWER:
Proportion
What is essential for consistent diamond cut grading? - ANSWER: Spot and diffused
fluorescent lighting
What happens to light rays outside the critical angle cone? - ANSWER: Reflect
interally
What did cutters apply the modern brilliant cut to fancy shapes? - ANSWER: to
maximize profit from oddly shaped or off color
How does laser sawing increase weight retention? - ANSWER: They are
computerized, so they are quicker and more precise. "Pie or Scoop sawing". That will
save the weight retention
What early cut introduced the culet? - ANSWER: table cut
