DDG Final Exam (11-20) UPDATED Exam Questions and CORRECT Answers
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Course
DDG
Institution
DDG
DDG Final Exam (11-20) UPDATED Exam
Questions and CORRECT Answers
The more an inclusion differs in color from its host diamond, - Correct Answer- the more
obvious it is
A feather that reaches a bezel surface as well as the surface of the pavilion main directly
under that bezel - Correct Ans...
DDG Final Exam (11-20) UPDATED Exam
Questions and CORRECT Answers
The more an inclusion differs in color from its host diamond, - Correct Answer- the more
obvious it is
A feather that reaches a bezel surface as well as the surface of the pavilion main directly
under that bezel - Correct Answer- should be plotted on both the crown and pavilion
diagrams
Blemishes don't usually affect the clarity grade in diamonds below - Correct Answer- IF
In a store with these clarity characteristics, which would probably 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
Diamonds with minute inclusions that range from difficult to very difficult to see under 10X
are classified - Correct Answer- VVS1 or VVS2
Inclusions or blemishes that establish the clarity grade of a diamond are collectively called -
Correct Answer- grade-setting characteristics
In most cases, the easier it is to see a clarity characteristic, the - Correct Answer- lower the
clarity grade
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
Relief - Correct Answer- Contrast between an inclusion and its host gem
Diamonds that are colorless to light, brown, and gray fall into the - Correct Answer- normal
color range
When a gem absorbs some wavelengths of light and transmits others, the process is called -
Correct Answer- selective absorption
A structural defect that influences a gems absorption of light is called a - Correct Answer-
color center
Type I diamonds contain - Correct Answer- Nitrogen
Emission of visible light by a material when it's exposed to invisible ultraviolet radiation is -
Correct Answer- fluorescence
The basic causes of a diamonds color are its crystal structure and - Correct Answer- chemical
composition
The most common colored diamond color is - Correct Answer- brown
, The relative lightness or darkness of a color is called its - Correct Answer- tone
The most common impurity element found in diamond is - Correct Answer- nitrogen
When boron is present in a diamond's crystal structure, it colors the diamond - Correct
Answer- blue
The most commonly observed color of fluorescence in gem diamond is - Correct Answer-
blue
A noticeably "oily" appearance seen in some diamonds is usually the result of - Correct
Answer- very strong fluorescence
Which of the following diamond colors would be the most valuable, all other factors being
equal? - Correct Answer- Red
A common method of permanently changing the color of a diamond is - Correct Answer-
irradiating
Type llb diamonds contain - Correct Answer- boron
Annealing - Correct Answer- using heat to stabilize irradiated color in gemstones
Color center - Correct Answer- Structural defect that influences an object's absorption of light
and can cause its color
Colored diamonds - Correct Answer- Yellow, brown, and gray diamonds with more color than
the Z masterstone, or that exhibit any other color face-up
Fluorescence - Correct Answer- The emission of visible light by a material when it's exposed
to ultraviolet radiation
Normal color range - Correct Answer- Range of diamond colors from colorless to light
yellow and light brown, also called the D-to-Z range
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