GIA DIAMONDS AND DIAMOND GRADING EXAM
Questions With 100% Correct Answers Latest
Versions 2025 TOP RATED A+
A surface indentation with tiny, root-like feathers penetrating the stone is
called a Right Ans - bruise
An included diamond crystal that extends to the surface of a fashioned
diamond is called a Right Ans - knot
Blemishes don't usually affect the clarity grade in diamonds below Right
Ans - IF
Inclusions or blemishes that establish the clarity grade of a diamond are
collectively called Right Ans - grade-setting characteristics.
On a plot, drawing a characteristic only in green indicates that it's Right
Ans - a blemish
A round brilliant-cut VVS diamond could have Right Ans - a small pinpoint
under a lower half facet.
In a stone with these clarity characteristics, which would probably be the
grade-setting characteristic? Right Ans - Feather
VS1 and VS2 stones might have Right Ans - minor included crystals and
feathers.
In most cases, the easier it is to see a clarity characteristic, the Right Ans -
lower the clarity grade.
A feather that reaches a bezel surface as well as the surface of the pavilion
main directly under that bezel Right Ans - should be plotted on both the
crown and pavilion diagrams.
One factor used to determine the clarity grade of a diamond is an inclusion's
Right Ans - location
,The designation SI means Right Ans - slightly included
Diamonds with minute inclusions that range from difficult to very difficult to
see under 10X are classified Right Ans - VS1 or VS2.
Which of these would disqualify a stone from being graded IF? Right Ans -
pinpoint
Inclusions are usually most visible when they're located Right Ans -
directly under the table.
A stone with only a few extra facets on its pavilion that can't be seen face-up
should be graded Right Ans - IF
The more an inclusion differs in color from its host diamond, Right Ans -
the more obvious it is.
The emission of visible light by a material when it's exposed to ultraviolet
radiation is called Right Ans - fluorescence.
Type I diamonds contain Right Ans - nitrogen
A structural defect that influences a gem's absorption of light is called a(n)
Right Ans - color center
A noticeable "oily" appearance seen in some diamonds is usually the result of
Right Ans - very strong fluorescence.
The most common impurity element found in diamond is Right Ans -
nitrogen
Type IIb diamonds contain Right Ans - boron
A common method of permanently changing the color of a diamond is
Right Ans - irradiating
When boron is present in a diamond's crystal structure, it colors the diamond
Right Ans - blue
, The most commonly observed color of fluorescence in gem diamond is
Right Ans - blue
The basic causes of a diamond's color are its crystal structure and Right
Ans - chemical composition.
The most common colored diamond color is Right Ans - brown
The relative lightness or darkness of a color is called its Right Ans - tone
Which of the following diamond colors would be the most valuable, all other
factors being equal? Right Ans - red
Diamonds that are colorless to light yellow, brown, and gray fall into the
Right Ans - normal color range
When a gem absorbs some wavelengths of light and transmits others, the
process is called Right Ans - selective absorption.
When color-grading with masterstones, you should Right Ans - move the
unknown to compare it on both sides of the masterstone.
The most widely accepted lighting for color-grading diamonds is Right Ans
- Balanced, daylight-equivalent fluorescent light
Diamonds outside the normal color range are graded Right Ans - face-up.
The diamonds used as comparison stones for color grading are called Right
Ans - color comparators
The basic face-up color of a colored diamond is known as its Right Ans -
characteristic color
Trade terms that describe diamond color Right Ans - can be misleading
Which of the following GIA color grades indicates the greatest amount of
yellow? Right Ans - H
Questions With 100% Correct Answers Latest
Versions 2025 TOP RATED A+
A surface indentation with tiny, root-like feathers penetrating the stone is
called a Right Ans - bruise
An included diamond crystal that extends to the surface of a fashioned
diamond is called a Right Ans - knot
Blemishes don't usually affect the clarity grade in diamonds below Right
Ans - IF
Inclusions or blemishes that establish the clarity grade of a diamond are
collectively called Right Ans - grade-setting characteristics.
On a plot, drawing a characteristic only in green indicates that it's Right
Ans - a blemish
A round brilliant-cut VVS diamond could have Right Ans - a small pinpoint
under a lower half facet.
In a stone with these clarity characteristics, which would probably be the
grade-setting characteristic? Right Ans - Feather
VS1 and VS2 stones might have Right Ans - minor included crystals and
feathers.
In most cases, the easier it is to see a clarity characteristic, the Right Ans -
lower the clarity grade.
A feather that reaches a bezel surface as well as the surface of the pavilion
main directly under that bezel Right Ans - should be plotted on both the
crown and pavilion diagrams.
One factor used to determine the clarity grade of a diamond is an inclusion's
Right Ans - location
,The designation SI means Right Ans - slightly included
Diamonds with minute inclusions that range from difficult to very difficult to
see under 10X are classified Right Ans - VS1 or VS2.
Which of these would disqualify a stone from being graded IF? Right Ans -
pinpoint
Inclusions are usually most visible when they're located Right Ans -
directly under the table.
A stone with only a few extra facets on its pavilion that can't be seen face-up
should be graded Right Ans - IF
The more an inclusion differs in color from its host diamond, Right Ans -
the more obvious it is.
The emission of visible light by a material when it's exposed to ultraviolet
radiation is called Right Ans - fluorescence.
Type I diamonds contain Right Ans - nitrogen
A structural defect that influences a gem's absorption of light is called a(n)
Right Ans - color center
A noticeable "oily" appearance seen in some diamonds is usually the result of
Right Ans - very strong fluorescence.
The most common impurity element found in diamond is Right Ans -
nitrogen
Type IIb diamonds contain Right Ans - boron
A common method of permanently changing the color of a diamond is
Right Ans - irradiating
When boron is present in a diamond's crystal structure, it colors the diamond
Right Ans - blue
, The most commonly observed color of fluorescence in gem diamond is
Right Ans - blue
The basic causes of a diamond's color are its crystal structure and Right
Ans - chemical composition.
The most common colored diamond color is Right Ans - brown
The relative lightness or darkness of a color is called its Right Ans - tone
Which of the following diamond colors would be the most valuable, all other
factors being equal? Right Ans - red
Diamonds that are colorless to light yellow, brown, and gray fall into the
Right Ans - normal color range
When a gem absorbs some wavelengths of light and transmits others, the
process is called Right Ans - selective absorption.
When color-grading with masterstones, you should Right Ans - move the
unknown to compare it on both sides of the masterstone.
The most widely accepted lighting for color-grading diamonds is Right Ans
- Balanced, daylight-equivalent fluorescent light
Diamonds outside the normal color range are graded Right Ans - face-up.
The diamonds used as comparison stones for color grading are called Right
Ans - color comparators
The basic face-up color of a colored diamond is known as its Right Ans -
characteristic color
Trade terms that describe diamond color Right Ans - can be misleading
Which of the following GIA color grades indicates the greatest amount of
yellow? Right Ans - H
