Brainscape's Knowledge GenomeTM

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


See full index

Diamond Essentials > Cut and Value > Flashcards

Cut and Value Flashcards

1
Q

The pavilion angle is formed by the girdle plane and what else?

A

Pavilion main facets

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

What does a diamond’s finish consist of?

A

Symmetry and polish

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

What is the primary purpose of the culet?

A

Prevent chipping

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

What is the sparkle that occurs in a diamond when the gem, its light source, or its observer moves?

A

Scintillation

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

What is the balance of a finished gem’s facet known as?

A

Symmetry

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

On fancy shapes such as the oval or pear, what might variations in the pavilion angle cause?

A

Bow-Ties

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

What are the sides near the points of marquises, pears, and hearts called?

A

Wings

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

What is the separation of white light into its spectral colors?

A

Dispersion

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

What is the quality of the polish and prevision of the cut of a fashioned gemstone?

A

Finish

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

What is present in diamonds when an unattractive gray ring under the table?

A

Shallow pavilions

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

What do symmetry variations include?

A

Off-center tables and misshapen facets

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

What two things form the crown angle?

A

The girdle plane and bezel facets

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

The pavilion depth percentage is expressed as a percentage of what?

A

Average girdle diameter

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

If a marquise cut measures 9mm x3mm, what is it’s length-to-width ratio?

A

3:1

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

What do the angles and relative measurements of a polished gem and the relationships between them describe?

A

Proportions

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

What are the eight basic proportions of a diamond?

A

Girdle Outline, Table Size (Table Percentage), Crown Angle, Girdle Thickness, Pavilion Depth Percentage (Pavilion Angle), Total Depth Percentage, Culet Size, Length-to-Width Ratio (Fancy Shapes)

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

Where are the Star Facets located?

A

The first ring of facets around the table, directly touching the Table and the Bezel Facets.

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

Where are the Bezel Facets located?

A

The second ring of facets, touching the Star Facets and the Upper Half Facet.

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

Where are the Upper Half Facets located?

A

The third ring of facets, edges touching the Bezel Facets and the Girdle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Where are the Lower Half Facets located?

A

The facets around the pavilion that connect from the Girdle to the Pavilion Main Facets.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Where are the Pavilion Main Facets located?

A

The facets around the pavilion that meet at the Culet and points up to the Girdle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

In most round brilliant table sizes, what is the range that reflects a compromise between weight retention and optical beauty?

A

Between 50% and 66%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What do most diamonds have crown angles between?

A

25 and 35

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Bruted Girdle

A

An unpolished girdle on a diamond that should look frosted or waxy.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is the Fisheye effect?

A

When the pavilions are shallower than 38%, and the girdle reflection forms an unattractive gray ring under the table.

26
Q

When do stones look dark in the center?

A

When the pavilions are deeper than 49%.

27
Q

What is a Nailhead effect?

A

When the pavilion depth is 50% or more and a dark area under the table is produced.

28
Q

What are the most popular length-to-width ratios for Marquises?

A

Between1.75:1 and 2.25:1

29
Q

What are the most popular length-to-width ratios for Ovals?

A

Between 1.33:1 and 1.66:1

30
Q

What are the most popular length-to-width ratios for Emerald cuts, Rectangular Cushions, and Pears?

A

Between 1.50:1 and 1.75:1

31
Q

What is the most popular length-to-width ratio for Hearts?

A

1:1

32
Q

For round brilliants, most table percentages are:

A

50% and 60%

33
Q

For round brilliants, most crown angles are:

A

25 and 35

34
Q

For round brilliants, most pavilion depths are:

A

Between 42% and 44%

34
Q

Total depth percentage is a combination of what three things?

A

Crown Height Percentage, Girdle Thickness Percentage, and Pavilion Depth Percentage

34
Q

What aspect of a diamonds cut do most fancy cuts have, but most rounds don’t?

A

The culet

34
Q

What are the eight primary factors that enter into an evaluation of a diamond’s polish?

A

Abrasions, lizard skin, nicks, pits, polish lines, burn marks, rough girdle, scratches

35
Q

What are the eight symmetry variations?

A

Table or culet off-center, girdle outline out-of-round, facets that fail to point properly, misaligned crown and pavilion facets, table not a regular octagon, misshapen facets, extra facets, uneven outline

36
Q
A
37
Q

Average Girdle Diameter

A

The result achieved by adding the smallest and largest girdle measurements of a round brilliant and dividing by two.

38
Q

Craftsmanship

A

The care that goes into the fashioning of a polished diamond, as confirmed by its finish.

39
Q

Crown Angle

A

The angle formed by the bezel facets and the girdle plane.

40
Q

Design

A

A diamond’s physical shape, including its proportions and durability, determined by decisions made during the fashioning process.

41
Q

Dispersion

A

The separation of white light into spectral colors.

42
Q

Finish

A

The quality of the polish and precision of the cut of a fashioned gemstone.

43
Q

Girdle Outline

A

Face-up shape of a polished gem.

44
Q

Length-to-Width Ratio

A

The comparison of the length to the width of a fancy-shaped diamond.

45
Q

Make

A

The qualities of a faceted diamond’s proportions and finish.

46
Q

Pavilion Angle

A

The angle formed by the pavilion main facets and the girdle plane.

47
Q

Pavilion Bulge

A

larger-than-usual pavilion angles on the middle tier of facets, designed to add weight to a step-cut stone.

48
Q

Pavilion Depth Percentage

A

The distance from the bottom of the girdle plane to the culet, expressed as a percentage of the average girdle diameter.

49
Q

Polish

A

The overall condition of the facet surfaces of a finished diamond.

50
Q

Proportions

A

The angles and relative measurements of a polished gem, and the relationships between them.

51
Q

Refraction

A

The change in speed and possible change in direction of light as it travels from one transparent material to another.

52
Q

Refractive Index (RI)

A

A measure of the change in the speed and angle of light as it passes from one material to another.

53
Q

Shoulder

A

One of the two sides adjacent to the rounded end of a pear or oval shape.

54
Q

Symmetry

A

The exactness of a finished gem’s shape and the placement of its facets.

55
Q

Table Percentage (Size)

A

Table size expressed as a percentage of a round brilliant’s average girdle diameter.

56
Q

Total Depth Percentage

A

Table-to-culet depth, expressed as a percentage of average girdle diameter.

57
Q

Wing

A

One of the two sides near the point of a marquise, pear, or heart shape.

Diamond Essentials (5 decks)

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