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Diamond Essentials > Diamonds and Diamond Value > Flashcards

Diamonds and Diamond Value Flashcards

1
Q

What is the term “point” in reference to weight equal to?

A

0.01 carat

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2
Q

Compared to blemishes, what do inclusions normally have?

A

More impact on a diamond’s value

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3
Q

The three major parts of a polished diamond are the crown, pavilion, and…

A

Girdle

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4
Q

What are the clarity characteristics confined to the surface of a polished diamond called?

A

Blemishes

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5
Q

What does the metric carat equal?

A

0.200 gram

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6
Q

What shape are the facets on a brilliant cut gemstone?

A

Mostly triangular or kite-shaped

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7
Q

What are the flashes of color called that you see in a polished diamond?

A

Fire

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8
Q

What is a gemstone’s resistance to scratching known as?

A

Hardness

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9
Q

On average, mine workers must process more than a ton of rock to recover…

A

a half carat of diamonds

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10
Q

What are the small, flat, polished surfaces on a diamond called?

A

Facets

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11
Q

What are the gem shapes and cutting styles other than the standard round brilliant called?

A

Fancy Cuts

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12
Q

What are diamonds primarily composed of?

A

Carbon

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13
Q

How many facets does a standard round brilliant-cut diamond have?

A

57-58

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14
Q

What does the combination of the Four C’s relate to?

A

Value

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15
Q

What are the three properties of durability?

A

Hardness, toughness, stability

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16
Q

What is Diamond rated as on the Mohs scale?

A

10

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17
Q

What is Corundum rated as on the Mohs scale?

A

9

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18
Q

What is Topaz rated as on the Mohs scale?

A

8

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19
Q

What is Quartz rated as on the Mohs scale?

A

7

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20
Q

What is Orthoclase Feldspar rated as on the Mohs scale?

A

6

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21
Q

What is Apatite rated as on the Mohs scale?

A

5

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22
Q

What is Fluorite rated as on the Mohs scale?

A

4

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23
Q

What is Calcite rated as on the Mohs scale?

A

3

24
Q

What is Gypsum rated as on the Mohs scale?

A

2

25
Q

What is Talc rated as on the Mohs scale?

A

1

26
Q

Baguette

A

A small, four-sided step cut that’s rectangular, square, or tapered.

27
Q

Blemish

A

Clarity characteristic that’s confined to the surface of a polished gemstone?

28
Q

Branded Cut

A

Cutting style that’s developed, named, and promoted by a specific manufacturer.

29
Q

Brightness

A

The effect of all the diamond’s internal and external reflections of white light.

30
Q

Brilliant Cut

A

Cutting style with triangular or kite-shaped facets that radiate from the center toward the girdle.

31
Q

Clarity Characteristics

A

The collective term for inclusions and blemishes.

32
Q

Crown

A

The top part of the gem above the girdle.

33
Q

Culet

A

A small facet at the bottom of a finished gem.

34
Q

Durability

A

A gemstone’s ability to withstand, wear, heat, and chemicals.

35
Q

Facet

A

A flat, polished surface on a finished gem.

36
Q

Fancy Cut

A

Any gemstone shape or cutting style other than a standard round brilliant.

37
Q

Fire

A

The flashes of color you see in a polished diamond.

38
Q

Four Cs

A

Four value factors (clarity, color, cut, and carat weight) that describe the quality of a finished diamond.

39
Q

Girdle

A

The narrow section of a finished gem that forms the boundary between the crown and the pavilion and functions as the gem’s setting edge.

40
Q

Inclusion

A

A clarity characteristic totally enclosed in a polished gemstone or extending into it from the surface.

41
Q

Karat

A

A unit of measure for the fineness of gold, abbreviated “K” or “Kt”.

42
Q

Lab-Grown Gem

A

A manmade (synthetic) gem with essentially the same chemical composition, crystal structure, and properties as its natural counterpart.

43
Q

Metric Carat

A

The international unit of measurement for gem weight. One carat equals one-fifth of a gem (0.200 g).

44
Q

Mixed Cut

A

A cut that combines brilliant-cut and step-cut styles.

45
Q

Mohs Scale

A

The ranking of the relative hardness of 10 minerals.

46
Q

Pavilion

A

The lower part of a faceted gem below the girdle.

47
Q

Scintillation

A

The flashes of light and the contrasting dark areas you see when the diamond, the light, or the observer moves.

48
Q

Simulant

A

A natural or manmade material that resembles a gem (also called imitation).

49
Q

Single Cut

A

A round stone with 17-18 facets.

50
Q

Stability

A

How well a diamond resists chemicals and temperature changes.

51
Q

Standard Round Brilliant

A

A round brilliant-cut stone with 57-58 facets. Often called a full cut.

52
Q

Step Cut

A

A cutting style that features long, narrow facets in rows parallel to the girdle on both the crown and pavilion.

53
Q

Thermal Shock

A

The damage caused by sudden, extreme temperature changes.

54
Q

Toughness

A

How well a gemstone resists breaking and chipping.

55
Q

Value Factors

A

Features used to judge the quality and value of all gemstones.

Diamond Essentials (5 decks)

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