GIA DIAMOND AND DIAMOND
GRADING EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) GRADED A+
Diamonds with minute inclusions that range from extremely difficult to very
difficult to see under 10X are classified... - ✔✔✔ Correct Answer >VVS1 or VVS2
D
O
Inclusions or blemishes that establish the clarity grade of a diamond are
collectively called... - ✔✔✔ Correct Answer >Grade-setting characteristics
N
O
T
In most cases, the easier it is to see a clarity characteristic, the - ✔✔✔ Correct Answer
C
>Lower than the clarity grade
O
PY
The designation SI means - ✔✔✔ Correct Answer >Slightly included
A round brilliant-cut VVS diamond could have... - ✔✔✔ Correct Answer >A small
pinpoint under a lower half facet
VS1 and VS2 stones might have... - ✔✔✔ Correct Answer >Minor included crystals
and feathers
One factor used to determine the clarity grade of a diamond is an inclusion's... -
✔✔✔ Correct Answer >Location
,A stone with only a few extra facets on its pavilion that can't be seen face-up
should be graded... - ✔✔✔ Correct Answer >Flawless
Inclusions are usually most visible when they're located... - ✔✔✔ Correct Answer
>Directly under the table
The purpose of the culet facet is to... - ✔✔✔ Correct Answer >Prevent chipping
A diamond grading system provides... - ✔✔✔ Correct Answer >A consistent way to
D
communicate diamond quality
O
N
A feather that reaches a bezel surface as well as the surface of the pavilion main
O
directly under that bezel... - ✔✔✔ Correct Answer >Should be plotted on both the
T
crown and pavilion diagrams
C
O
Blemishes don't usually affect the clarity grade in diamonds below... - ✔✔✔ Correct
PY
Answer >IF
In a stone with these clarity characteristics, which would be the grade-setting
characteristic? - ✔✔✔ Correct Answer >Feather
Which of these would disqualify a stone from being graded IF? - ✔✔✔ Correct
Answer >Pinpoint
On a plot, drawing a characteristic only in green indicates that it's... - ✔✔✔ Correct
Answer >A blemish
,A round brilliant diamond's table size is expressed as... - ✔✔✔ Correct Answer >A
percentage of its average girdle diameter
If a diamond's total depth percentage is 51.0 percent, its cut grade will be... - ✔✔✔
Correct Answer >Fair or Poor
A transparent measuring device divided into millimetres and tenths of a millimetre,
used to measure a diamond's table, is called a... - ✔✔✔ Correct Answer >Table gauge
D
O
An advantage of the face-up method of crown-angle estimation is that it... - ✔✔✔
N
Correct Answer >Can be used with mounted diamonds
O
T
What is the crown height percentage of a diamond with a crown angle of 52
C
degrees and a 60 percent tab? - ✔✔✔ Correct Answer >12.2 percent
O
PY
An extremely thick girdle... - ✔✔✔ Correct Answer >Adds weight without
contributing to the stone's appearance
Most round brilliants have table percentages that range from about... - ✔✔✔ Correct
Answer >55 to 65 percent
The crown angle is the angle formed by the girdle plane and the... - ✔✔✔ Correct
Answer >Bezel facets
, The equation of total depth percentage? - ✔✔✔ Correct Answer >Depth/Average
girdle diameter
The equation of table percentage? - ✔✔✔ Correct Answer >Average table
measurements/average girdle diameter
On a well-made diamond. The girdle will... - ✔✔✔ Correct Answer >Have just enough
thickness to prevent chipping
A weight-retention method that adjusts the angles of some facets to allow portions
D
of a diamond's girdle to be thicker is called... - ✔✔✔ Correct Answer >Painting
O
N
When using the following method, star facets that reach one-third of the way
O
towards the girdle make the lines appear... - ✔✔✔ Correct Answer >To bow out
T
C
When using the racial methods for estimating table percentage, a 1:1 1/4 indicates
O
a table of approximately... - ✔✔✔ Correct Answer >60 percent
PY
As a diamond's pavilion gets deeper, its table reflection becomes... - ✔✔✔ Correct
Answer >Larger
If a diamond's culet is too large, it will look like... - ✔✔✔ Correct Answer >A black
spot under the table
Which of the following pavilion depth percentages would most likely cause the
girdle reflection to be visible face-up through the table? - ✔✔✔ Correct Answer >37.0
percent
GRADING EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) GRADED A+
Diamonds with minute inclusions that range from extremely difficult to very
difficult to see under 10X are classified... - ✔✔✔ Correct Answer >VVS1 or VVS2
D
O
Inclusions or blemishes that establish the clarity grade of a diamond are
collectively called... - ✔✔✔ Correct Answer >Grade-setting characteristics
N
O
T
In most cases, the easier it is to see a clarity characteristic, the - ✔✔✔ Correct Answer
C
>Lower than the clarity grade
O
PY
The designation SI means - ✔✔✔ Correct Answer >Slightly included
A round brilliant-cut VVS diamond could have... - ✔✔✔ Correct Answer >A small
pinpoint under a lower half facet
VS1 and VS2 stones might have... - ✔✔✔ Correct Answer >Minor included crystals
and feathers
One factor used to determine the clarity grade of a diamond is an inclusion's... -
✔✔✔ Correct Answer >Location
,A stone with only a few extra facets on its pavilion that can't be seen face-up
should be graded... - ✔✔✔ Correct Answer >Flawless
Inclusions are usually most visible when they're located... - ✔✔✔ Correct Answer
>Directly under the table
The purpose of the culet facet is to... - ✔✔✔ Correct Answer >Prevent chipping
A diamond grading system provides... - ✔✔✔ Correct Answer >A consistent way to
D
communicate diamond quality
O
N
A feather that reaches a bezel surface as well as the surface of the pavilion main
O
directly under that bezel... - ✔✔✔ Correct Answer >Should be plotted on both the
T
crown and pavilion diagrams
C
O
Blemishes don't usually affect the clarity grade in diamonds below... - ✔✔✔ Correct
PY
Answer >IF
In a stone with these clarity characteristics, which would be the grade-setting
characteristic? - ✔✔✔ Correct Answer >Feather
Which of these would disqualify a stone from being graded IF? - ✔✔✔ Correct
Answer >Pinpoint
On a plot, drawing a characteristic only in green indicates that it's... - ✔✔✔ Correct
Answer >A blemish
,A round brilliant diamond's table size is expressed as... - ✔✔✔ Correct Answer >A
percentage of its average girdle diameter
If a diamond's total depth percentage is 51.0 percent, its cut grade will be... - ✔✔✔
Correct Answer >Fair or Poor
A transparent measuring device divided into millimetres and tenths of a millimetre,
used to measure a diamond's table, is called a... - ✔✔✔ Correct Answer >Table gauge
D
O
An advantage of the face-up method of crown-angle estimation is that it... - ✔✔✔
N
Correct Answer >Can be used with mounted diamonds
O
T
What is the crown height percentage of a diamond with a crown angle of 52
C
degrees and a 60 percent tab? - ✔✔✔ Correct Answer >12.2 percent
O
PY
An extremely thick girdle... - ✔✔✔ Correct Answer >Adds weight without
contributing to the stone's appearance
Most round brilliants have table percentages that range from about... - ✔✔✔ Correct
Answer >55 to 65 percent
The crown angle is the angle formed by the girdle plane and the... - ✔✔✔ Correct
Answer >Bezel facets
, The equation of total depth percentage? - ✔✔✔ Correct Answer >Depth/Average
girdle diameter
The equation of table percentage? - ✔✔✔ Correct Answer >Average table
measurements/average girdle diameter
On a well-made diamond. The girdle will... - ✔✔✔ Correct Answer >Have just enough
thickness to prevent chipping
A weight-retention method that adjusts the angles of some facets to allow portions
D
of a diamond's girdle to be thicker is called... - ✔✔✔ Correct Answer >Painting
O
N
When using the following method, star facets that reach one-third of the way
O
towards the girdle make the lines appear... - ✔✔✔ Correct Answer >To bow out
T
C
When using the racial methods for estimating table percentage, a 1:1 1/4 indicates
O
a table of approximately... - ✔✔✔ Correct Answer >60 percent
PY
As a diamond's pavilion gets deeper, its table reflection becomes... - ✔✔✔ Correct
Answer >Larger
If a diamond's culet is too large, it will look like... - ✔✔✔ Correct Answer >A black
spot under the table
Which of the following pavilion depth percentages would most likely cause the
girdle reflection to be visible face-up through the table? - ✔✔✔ Correct Answer >37.0
percent
