GIA Diamond and Diamond Grading
(2018) GRADED A QUESTIONS AND
ANSWERS
Save
Depend on the market conditions that exist when the lists are published - CORRECT
ANSWER Diamonds prices on wholesale price lists
Graded more thoroughly than small, low quality ones - CORRECT ANSWER
Large, high-quality diamonds are...
A result of the conditions under which it formed - CORRECT ANSWER Diamond's
supreme hardness and durability are...
Must spend additional time and money to evaluate and develop them - CORRECT
ANSWER Once diamond deposits are located, mining companies...
Appraisal - CORRECT ANSWER An estimation of the value of an article is a(n)...
Reputable gemological laboratories - CORRECT ANSWER The most consistent
and dependable sources of diamond grades are...
Can buy in large quantities - CORRECT ANSWER Substantial price discounts are
available to retailers and jewellery manufacturers who...
Quality - CORRECT ANSWER A diamond's clarity and colour grades indicate its...
Mountings hide details of clarity and cut - CORRECT ANSWER Reputable
gemological laboratories don't grade mounted diamonds because...
Sieves - CORRECT ANSWER Dealers often sort melee by size using...
The world's supply of diamond rough has increased - CORRECT ANSWER The
diamond industry has changed dramatically in recent years because...
The rise of the cutting industry in India - CORRECT ANSWER The Argyle mine in
Australia contributed to...
,The specific combinations of the Four Cs - CORRECT ANSWER Wholesale price
lists are usually organised according to...
Growth marks - CORRECT ANSWER Squares or rectangles, trigons, and parallel
grooves are types of...
Octahedral planes - CORRECT ANSWER The crystal planes most suitable for
cleaving a diamond are the...
Dodecahedral - CORRECT ANSWER Which is the softest direction in diamond?
It affects the amount of weight retained after cutting - CORRECT ANSWER
Crystal shape is an important factor in the evaluation of rough because...
A well-formed octahedral crystal - CORRECT ANSWER The diamond term glassie
refers to...
Mineral - CORRECT ANSWER A naturally occurring, inorganic substance with a
characteristic chemical composition and usually a characteristic crystal structure is
known as a...
Octahedron - CORRECT ANSWER The habit of gem-quality diamond is the...
Isometric - CORRECT ANSWER Another name for the cubic crystal system is...
Relatively wide spaces between some atomic planes - CORRECT ANSWER In
diamonds, cleavage is caused by...
Macle - CORRECT ANSWER A flat, triangular twinned diamond crystal is called
a...
Covalent - CORRECT ANSWER The strongest of all atomic bonds are called...
Crystal - CORRECT ANSWER Solid matter with atoms arranged in a regular,
repeating pattern is called a(n)...
Unit cell - CORRECT ANSWER The smallest group of atoms with a characteristic
chemical composition and the basic crystal structure of a mineral is called a(n)...
3.52 - CORRECT ANSWER What is the specific gravity of gem-quality diamond?
Trace elements - CORRECT ANSWER Atoms in a gem that aren't part of its
essential chemical composition are called...
,Pattern - CORRECT ANSWER The relative size, arrangement, and contrast of
bright and dark areas that result from a diamond's internal and external reflections is
called...
Fire - CORRECT ANSWER The flashes of colour you see in a polished diamond
are called...
Appearance - CORRECT ANSWER Variations in lightning and surroundings can
affect a diamond's...
A form of radiant energy - CORRECT ANSWER Visible light is...
A combination of all the spectral colours - CORRECT ANSWER White light is
actually...
Transmission - CORRECT ANSWER The passage of light into or through a
material is called...
More it slows down light - CORRECT ANSWER The higher the optical density of a
material, the...
Refraction - CORRECT ANSWER The change in speed and possible change in
direction of light as it travels from one material to another is called...
Inside the critical angle - CORRECT ANSWER In order to exit a diamond, light
must strike an inner surface...
Scintillation - CORRECT ANSWER The flashes of light and the contrasting dark
areas you see when the diamond, the light, or the observer moves are called...
Luster - CORRECT ANSWER The appearance of a material's surface in reflected
light is called...
More light leakage from the pavilion - CORRECT ANSWER Grease on the pavilion
of diamond results in...
Dispersion - CORRECT ANSWER The difference between the RI values of
specific violet and red wavelengths of visible light for a given material is its...
Angle of reflection - CORRECT ANSWER The angle of incidence always equals
the...
, Brightness - CORRECT ANSWER The combined effect of all the diamond's
surface and internal white light reflections is its...
Shape - CORRECT ANSWER The size of a finished gem depends greatly upon
the rough diamond's...
Kerf - CORRECT ANSWER A notch scratched into diamond rough to prepare it for
cleaving is called a...
17 or 18 - CORRECT ANSWER The number of facets on a single-cut diamond
is...
An old European cut - CORRECT ANSWER An early brilliant that has a circular
girdle outline is called...
Dop and tang - CORRECT ANSWER The devices that grip and hold a diamond for
polishing are known as the...
Rose cut - CORRECT ANSWER The cutting style with a flat bottom and a variable
number of facets that come to a peak at the top is the...
Planner - CORRECT ANSWER The person who decides where to mark diamond
rough for fashioning is called the...
Laser sawing - CORRECT ANSWER The directional properties and structural
features of a diamond crystal do not really matter in...
Allowing for greater weight retention from rough - CORRECT ANSWER The rotary
saw contributed to the diamond-cutting industry by...
Growth marks - CORRECT ANSWER To help determine crystal directions,
diamond cutters look for...
Maximise profits - CORRECT ANSWER A diamond cutter's main objective are to
produce an attractive finished diamond and...
Brillianteering - CORRECT ANSWER The process of polishing the star and upper
and lower half facets is called...
Polishing a window to view the interior - CORRECT ANSWER When the rough
has a frosty or non-transparent surface surface, the cutter can look for inclusions by...
(2018) GRADED A QUESTIONS AND
ANSWERS
Save
Depend on the market conditions that exist when the lists are published - CORRECT
ANSWER Diamonds prices on wholesale price lists
Graded more thoroughly than small, low quality ones - CORRECT ANSWER
Large, high-quality diamonds are...
A result of the conditions under which it formed - CORRECT ANSWER Diamond's
supreme hardness and durability are...
Must spend additional time and money to evaluate and develop them - CORRECT
ANSWER Once diamond deposits are located, mining companies...
Appraisal - CORRECT ANSWER An estimation of the value of an article is a(n)...
Reputable gemological laboratories - CORRECT ANSWER The most consistent
and dependable sources of diamond grades are...
Can buy in large quantities - CORRECT ANSWER Substantial price discounts are
available to retailers and jewellery manufacturers who...
Quality - CORRECT ANSWER A diamond's clarity and colour grades indicate its...
Mountings hide details of clarity and cut - CORRECT ANSWER Reputable
gemological laboratories don't grade mounted diamonds because...
Sieves - CORRECT ANSWER Dealers often sort melee by size using...
The world's supply of diamond rough has increased - CORRECT ANSWER The
diamond industry has changed dramatically in recent years because...
The rise of the cutting industry in India - CORRECT ANSWER The Argyle mine in
Australia contributed to...
,The specific combinations of the Four Cs - CORRECT ANSWER Wholesale price
lists are usually organised according to...
Growth marks - CORRECT ANSWER Squares or rectangles, trigons, and parallel
grooves are types of...
Octahedral planes - CORRECT ANSWER The crystal planes most suitable for
cleaving a diamond are the...
Dodecahedral - CORRECT ANSWER Which is the softest direction in diamond?
It affects the amount of weight retained after cutting - CORRECT ANSWER
Crystal shape is an important factor in the evaluation of rough because...
A well-formed octahedral crystal - CORRECT ANSWER The diamond term glassie
refers to...
Mineral - CORRECT ANSWER A naturally occurring, inorganic substance with a
characteristic chemical composition and usually a characteristic crystal structure is
known as a...
Octahedron - CORRECT ANSWER The habit of gem-quality diamond is the...
Isometric - CORRECT ANSWER Another name for the cubic crystal system is...
Relatively wide spaces between some atomic planes - CORRECT ANSWER In
diamonds, cleavage is caused by...
Macle - CORRECT ANSWER A flat, triangular twinned diamond crystal is called
a...
Covalent - CORRECT ANSWER The strongest of all atomic bonds are called...
Crystal - CORRECT ANSWER Solid matter with atoms arranged in a regular,
repeating pattern is called a(n)...
Unit cell - CORRECT ANSWER The smallest group of atoms with a characteristic
chemical composition and the basic crystal structure of a mineral is called a(n)...
3.52 - CORRECT ANSWER What is the specific gravity of gem-quality diamond?
Trace elements - CORRECT ANSWER Atoms in a gem that aren't part of its
essential chemical composition are called...
,Pattern - CORRECT ANSWER The relative size, arrangement, and contrast of
bright and dark areas that result from a diamond's internal and external reflections is
called...
Fire - CORRECT ANSWER The flashes of colour you see in a polished diamond
are called...
Appearance - CORRECT ANSWER Variations in lightning and surroundings can
affect a diamond's...
A form of radiant energy - CORRECT ANSWER Visible light is...
A combination of all the spectral colours - CORRECT ANSWER White light is
actually...
Transmission - CORRECT ANSWER The passage of light into or through a
material is called...
More it slows down light - CORRECT ANSWER The higher the optical density of a
material, the...
Refraction - CORRECT ANSWER The change in speed and possible change in
direction of light as it travels from one material to another is called...
Inside the critical angle - CORRECT ANSWER In order to exit a diamond, light
must strike an inner surface...
Scintillation - CORRECT ANSWER The flashes of light and the contrasting dark
areas you see when the diamond, the light, or the observer moves are called...
Luster - CORRECT ANSWER The appearance of a material's surface in reflected
light is called...
More light leakage from the pavilion - CORRECT ANSWER Grease on the pavilion
of diamond results in...
Dispersion - CORRECT ANSWER The difference between the RI values of
specific violet and red wavelengths of visible light for a given material is its...
Angle of reflection - CORRECT ANSWER The angle of incidence always equals
the...
, Brightness - CORRECT ANSWER The combined effect of all the diamond's
surface and internal white light reflections is its...
Shape - CORRECT ANSWER The size of a finished gem depends greatly upon
the rough diamond's...
Kerf - CORRECT ANSWER A notch scratched into diamond rough to prepare it for
cleaving is called a...
17 or 18 - CORRECT ANSWER The number of facets on a single-cut diamond
is...
An old European cut - CORRECT ANSWER An early brilliant that has a circular
girdle outline is called...
Dop and tang - CORRECT ANSWER The devices that grip and hold a diamond for
polishing are known as the...
Rose cut - CORRECT ANSWER The cutting style with a flat bottom and a variable
number of facets that come to a peak at the top is the...
Planner - CORRECT ANSWER The person who decides where to mark diamond
rough for fashioning is called the...
Laser sawing - CORRECT ANSWER The directional properties and structural
features of a diamond crystal do not really matter in...
Allowing for greater weight retention from rough - CORRECT ANSWER The rotary
saw contributed to the diamond-cutting industry by...
Growth marks - CORRECT ANSWER To help determine crystal directions,
diamond cutters look for...
Maximise profits - CORRECT ANSWER A diamond cutter's main objective are to
produce an attractive finished diamond and...
Brillianteering - CORRECT ANSWER The process of polishing the star and upper
and lower half facets is called...
Polishing a window to view the interior - CORRECT ANSWER When the rough
has a frosty or non-transparent surface surface, the cutter can look for inclusions by...
