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Gemmology > Chapter 11 Colored Diamonds Color > Flashcards

Chapter 11 Colored Diamonds Color Flashcards

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1
Q

What is the GIA Colored Diamond Grading System based on?

A

It evolved from the D-to-Z system

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2
Q

What do graders use to mark boundaries between color designations?

A

Reference stones

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3
Q

How do graders compare colored diamonds?

A

Side by side in a controlled lighting and viewing environment

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4
Q

True or False: Colored diamonds are simpler to grade than diamonds in the normal color range.

A

False

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5
Q

What has GIA established for grading colored diamonds?

A

A system for color grading these exceptional stones

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6
Q

What is a key reason for knowing how graders in the lab grade colored diamonds?

A

To appreciate the process and discuss it with clients

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7
Q

Fill in the blank: The GIA Colored Diamond Grading System applies special terms to _______.

A

[color ranges]

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8
Q

What does the GIA Colored Diamond Grading System describe?

A

Color objectively using clearly defined color references

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9
Q

Why is the GIA Colored Diamond Grading System considered less subjective?

A

It uses clearly defined color references

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10
Q

What is a potential drawback of using a descriptive approach for color identification?

A

It makes identification more personal or cultural

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11
Q

What terms might a descriptive approach use for color identification?

A
  • Lemon yellow
  • Harvest gold
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12
Q

What challenge does a descriptive approach present in terms of application?

A

Makes universal application of the system almost impossible

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13
Q

Why is color designation important in the context of colored diamonds?

A

It can be worth a lot of money

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14
Q

What is necessary for a color designation to be effective globally?

A

It needs to be understood and accepted throughout the world

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15
Q

What does each of the 27 basic hue terms represent?

A

A range of color within the hue circle

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16
Q

When a description consists of more than one color, where is the predominant color stated?

A

Last

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17
Q

Do different hues reach their highest saturation at different tones?

A

Yes

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18
Q

Fill in the blank: The hue term for the color that is a mix of red and orange is _______.

A

ORANGY RED

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19
Q

What is the hue term for a color described as reddish orange?

A

REDDISH ORANGE

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20
Q

What is the hue term for orange mixed with yellow?

A

YELLOWISH ORANGE

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21
Q

Fill in the blank: The hue term for a color that is a combination of yellow and orange is _______.

A

YELLOWORANGE

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22
Q

What is the hue term for a color that is predominantly yellow and has a greenish tint?

A

YELLOW GREEN

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23
Q

What hue term describes a color that is greenish yellow?

A

GREENYELLOW

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24
Q

What is the hue term for a color that is a mix of green and yellow?

A

YELLOWISH GREEN

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25
Fill in the blank: The hue term for a color that is predominantly green with a bluish tint is _______.
BLUISH GREEN
26
What hue term describes a color that is a mix of blue and green?
BLUEGREEN
27
What is the hue term for a color that is predominantly blue with a violet tint?
VIOLETISH BLUE
28
What hue term describes a color that is bluish violet?
BLUISH VIOLET
29
Fill in the blank: The hue term for a color that is a mix of red and violet is _______.
PURPLERED
30
What is the hue term for a color that is predominantly purple?
PURPLE
31
What hue term describes a color that is reddish purple?
REDDISH PURPLE
32
How many hues does GIA recognize for color grading diamonds?
27 hues ## Footnote This is a practical limit on color descriptions in diamond grading.
33
What is the purpose of the hue circle in GIA's grading system?
It serves as the first point of reference for all GIA graders when preparing a colored diamond grading report. ## Footnote The hue circle clearly illustrates the boundaries of each color range.
34
What types of colors are included in the 27 hues recognized by GIA?
Basic colors and mixed colors ## Footnote Examples include red, blue, green, orangy red, green-blue, and greenish yellow.
35
In the GIA system, where is the predominant hue stated?
Last ## Footnote This affects terms like ‘yellow-green’ and ‘green-yellow’, which represent different hues.
36
True or False: The term 'pink' in the GIA system can replace 'red'.
True ## Footnote This occurs when reddish orange to reddish purple hues are pale.
37
Fill in the blank: The GIA color grading system creates terminology that is precise enough for the lab but _______ enough for the marketplace.
accessible ## Footnote This balance is essential for effective communication in diamond grading.
38
What determines the highest saturation of different hues in the GIA system?
Different tones ## Footnote Each hue reaches its highest saturation at varying tones.
39
What grade term describes a diamond's hue with low tone and saturation?
Faint ## Footnote Faint indicates the least intensity in hue.
40
What is the grade term for a diamond that is very light in hue?
Very Light ## Footnote Very Light indicates a slight presence of color.
41
Which grade term indicates a diamond with a combination of medium tone and saturation?
Fancy ## Footnote Fancy is a standard term for colored diamonds.
42
What grade term corresponds to a diamond with high saturation and deep tone?
Fancy Deep ## Footnote Fancy Deep denotes a rich color presence.
43
Fill in the blank: A diamond that is described as 'Fancy Vivid' has a __________ hue.
very high saturation and tone ## Footnote Fancy Vivid is one of the highest grades for hue.
44
What grade term is used for a diamond with a medium tone and high saturation?
Fancy Intense ## Footnote Fancy Intense is a strong color grade.
45
Which grade term indicates a diamond with a light tone and low saturation?
Light ## Footnote Light describes a subtle color presence.
46
What grade term indicates a diamond with a combination of light tone and high saturation?
Fancy Light ## Footnote Fancy Light signifies a lighter color with richness.
47
What is the grade term for a diamond that is dark in hue?
Fancy Dark ## Footnote Fancy Dark indicates a deeper, richer color.
48
What grade term indicates a diamond with a medium tone and vivid saturation?
Fancy Vivid ## Footnote Fancy Vivid represents one of the most desirable color intensities.
49
What term is used to describe the strength of a diamond's hue?
Hue strength plays a significant role in determining colored diamond value.
50
What happens to the value of a diamond as the strength of its hue increases?
The stronger the hue, the more valuable the diamond.
51
How does the saturation of yellow diamonds compare to blue diamonds?
Yellow diamonds occur in a wide range of saturations while blue diamonds do not.
52
What is the effect of color depth on grading boundaries for yellow and blue diamonds?
The boundaries for fancy grades in the yellow hue range allow for greater depths of color than they do in the blue hue range.
53
What does color distribution refer to in diamond grading?
The evenness or unevenness of color seen face-up using standard viewing procedures.
54
What terms are used to describe color distribution in diamond grading?
Color distribution is stated as 'uneven' or 'even.'
55
Which diamond grades use color distribution in their grading process?
* Fancy * Fancy Intense * Fancy Dark * Fancy Deep * Fancy Vivid
56
What is the first step graders take when grading a colored diamond?
Placing the stone to be graded face-up in a plastic tray inside a viewing box.
57
What is the purpose of the viewing box in the grading process?
It provides a controlled, neutral environment.
58
What role does the tray serve in the diamond grading process?
The tray serves as a stone holder.
59
What are the obstacles to grading faceted colored diamonds?
They present a mosaic of colors depending on the viewing angle, angle of light source, cut of the diamond, and high refractive index of diamond.
60
How does a grader find the best angle to see a diamond's characteristic color?
The grader rocks the diamond slightly in the tray.
61
What is the overall basic color of a diamond?
The color viewed in the face-up position, excluding surface reflections, fire, and dark or washed-out areas.
62
How does a grader narrow the color range of an unknown diamond?
By systematically comparing it with each reference stone.
63
What do colored diamond reference stones offer compared to masterstones?
They come in a greater variety of colors.
64
What is typically sufficient for completing the color grading process of a diamond?
Colored diamond reference stones.
65
What do graders use when colored diamond reference stones are unavailable?
Opaque color chips.
66
True or False: The cut of the diamond does not affect its grading.
False
67
Fill in the blank: The diamond's characteristic color is evaluated in the _______ position.
face-up
68
What is the main objective of grading a diamond's color?
To arrive at repeatable results that are consistent between graders.
69
What is used to determine the location of a diamond’s characteristic color?
The most comparable reference stones.
70
What system is referenced for determining a diamond's color?
The GIA system.
71
True or False: Graders should describe the diamond using different terminology.
False.
72
Fill in the blank: The grader assigns the terminology that corresponds to the diamond's _______.
[characteristic color].
73
What should graders end up describing the diamond with?
The same words.
74
What does the grader succeed in determining when the diamond is bracketed?
The location of the diamond’s characteristic color.

Gemmology (42 decks)

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