Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Diamond Essentials > 3 - Color and Value > Flashcards

3 - Color and Value Flashcards

1
Q

Near-colorless

A

G-J

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Colorless

A

D-F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Faint

A

K-M

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Very Light

A

N-R

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Light

A

S-Z

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Normal color range

A

D-Z, colorless to light yellow, brown, and grey

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Of the color components hue, tone, and saturation, what does the GIA scale describe?

A

Tone and saturation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Depth-of-color

A

The combination of tone sand saturation that determines how noticeable a color is.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How do mountings affect apparent color?

A

A complimentary mounting can make stones in the G-I range appear colorless. GIA does not grade mounted diamonds.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What range appears nearly colorless to the naked eye?

A

J-L

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

At which grade will an individual start to see color to the naked eye?

A

Beyond M.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Masterstones

A

a set of color comparison diamonds that defines GIA’s color grades in the normal range.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the three factors that consistent color grading depends upon?

A

1) Masterstones
2) Environment
3) Grader

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

When is it appropriate to use “color memory” to grade?

A

Never. Always compare with a set of masterstones.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Where are color differences more visible?

A

Subtle differences are more visible through the pavilion, so the color is graded table-down.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the best colors for your lab?

A

Neutral grey, white.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How do you obtain proper lighting for grading color?

A

Use steady fluorescent daylight bulb.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How can a grader be at their top game?

A

Stay up to date on training, maintain good health habits.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Fluorescence

A

Emission of visible light by a material when exposed to UV radiation.

20
Q

Ultraviolet (UV)

A

Light wavelength that’s invisible to the human eye.

21
Q

In what % of diamonds can you see fluorescence?

A

About 35%

22
Q

In what colors does fluorescence manifest?

A

Blue is most common, possibilities include white, yellow, and orange.

23
Q

How can fluorescence enhance a gem?

A

Blue fluorescence can mask yellow color.

24
Q

How can fluorescence detract from a gem?

A

Too strong fluorescence might make a stone look cloudy or oily.

25
Q

Colored diamonds

A

Yellow, brown and gray diamonds with more color than the Z masterstone; OR diamonds that exhibit any other color face-up.

26
Q

How does the value change as the color deepens in a colored diamond?

A

The value increases as the color deepens.

27
Q

What are the least common colored diamond colors?

A

Red, green, purple, and orange.

28
Q

What are some of the middle-rarity colored diamond colors?

A

Pink, blue

29
Q

What are the most common colored diamond colors?

A

Yellow, brown, black, milky. Less valuable than other colored stones

30
Q

Describe a colored diamond’s usually depth-of-color.

A

Saturation often low, muted with grey/brown, or blended with other colors.

31
Q

What is the key difference in grading colored as opposed to “normal” diamonds?

A

Evaluate face up to better assess hue, tone, and saturation.

32
Q

Characteristic color

A

The basic face-up color of a colored diamond. Excludes surface reflections, fire, and dark or washed-out areas

33
Q

What final color grade for a colored diamond apply to all colors except yellow?

A

Faint, Very Light, Light

34
Q

Name 5 depth-of-color grading terms.

A

Faint
Very Light
Light
Fancy Light
Fancy
Fancy Intense
Fancy Vivid
Fancy Dark
Fancy Deep

35
Q

Color treatment

A

A way to alter or add color by coating, irradiation, heating, or a combination of the latter two.

36
Q

Coating

A

Super-thin layers of chemicals applied to a few of the pavilion facets, or to a tiny spot on the culet or around girdle.

37
Q

Where is a coating usually applied?

A

Pavilion facets, a spot on the culet, or around the girdle.

38
Q

How can one detect a coating?

A

Visually, the color may be unusual and difficult to classify. Can also be confirmed under a microscope.

39
Q

Can coatings be removed?

A

Yes, even polishing can remove a coating.

40
Q

Irradiation

A

A treatment that changes the color of a gem by exposing it to radioactive materials by changing the crystal structure of the diamond.

41
Q

Annealing

A

A gemstone heating process that can be used alone or to stabilize irradiated color.

42
Q

Fracture filling

A

Doesn’t change actual color and apparent will change if filling material removed or damaged.

43
Q

HPHT

A

A combination of high pressure and high temperature to lighten, remove, or create color.

44
Q

How light can HPHT make a diamond?

A

D-H

45
Q

Which kinds of treated diamonds with GIA grade?

A

Anything considered permanent (HPHT, Irradiation)

46
Q

What are the Two Rs when selling color?

A

Rarity and romance

47
Q

What do rarity and romance describe with respect to the Two Rs?

A

Rarity will explain value, romance will sell a diamond’s ethos.

Diamond Essentials (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions