Diamonds and Diamond Value

Question 1

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

Answer 1

0.01 carat

Question 2

Compared to blemishes, what do inclusions normally have?

Answer 2

More impact on a diamond’s value

Question 3

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

Answer 3

Girdle

Question 4

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

Answer 4

Blemishes

Question 5

What does the metric carat equal?

Answer 5

0.200 gram

Question 6

What shape are the facets on a brilliant cut gemstone?

Answer 6

Mostly triangular or kite-shaped

Question 7

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

Answer 7

Fire

Question 8

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

Answer 8

Hardness

Question 9

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

Answer 9

a half carat of diamonds

Question 10

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

Answer 10

Facets

Question 11

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

Answer 11

Fancy Cuts

Question 12

What are diamonds primarily composed of?

Answer 12

Carbon

Question 13

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

Answer 13

57-58

Question 14

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

Answer 14

Value

Question 15

What are the three properties of durability?

Answer 15

Hardness, toughness, stability

Question 16

What is Diamond rated as on the Mohs scale?

Answer 16

10

Question 17

What is Corundum rated as on the Mohs scale?

Answer 17

9

Question 18

What is Topaz rated as on the Mohs scale?

Answer 18

8

Question 19

What is Quartz rated as on the Mohs scale?

Answer 19

7

Question 20

What is Orthoclase Feldspar rated as on the Mohs scale?

Answer 20

6

Question 21

What is Apatite rated as on the Mohs scale?

Answer 21

5

Question 22

What is Fluorite rated as on the Mohs scale?

Answer 22

4

Question 23

What is Calcite rated as on the Mohs scale?

Answer 23

3

Question 24

What is Gypsum rated as on the Mohs scale?

Answer 24

2

Question 25

What is Talc rated as on the Mohs scale?

Answer 25

1

Question 26

Baguette

Answer 26

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

Question 27

Blemish

Answer 27

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

Question 28

Branded Cut

Answer 28

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

Question 29

Brightness

Answer 29

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

Question 30

Brilliant Cut

Answer 30

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

Question 31

Clarity Characteristics

Answer 31

The collective term for inclusions and blemishes.

Question 32

Crown

Answer 32

The top part of the gem above the girdle.

Question 33

Culet

Answer 33

A small facet at the bottom of a finished gem.

Question 34

Durability

Answer 34

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

Question 35

Facet

Answer 35

A flat, polished surface on a finished gem.

Question 36

Fancy Cut

Answer 36

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

Question 37

Fire

Answer 37

The flashes of color you see in a polished diamond.

Question 38

Four Cs

Answer 38

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

Question 39

Girdle

Answer 39

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.

Question 40

Inclusion

Answer 40

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

Question 41

Karat

Answer 41

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

Question 42

Lab-Grown Gem

Answer 42

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

Question 43

Metric Carat

Answer 43

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

Question 44

Mixed Cut

Answer 44

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

Question 45

Mohs Scale

Answer 45

The ranking of the relative hardness of 10 minerals.

Question 46

Pavilion

Answer 46

The lower part of a faceted gem below the girdle.

Question 47

Scintillation

Answer 47

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

Question 48

Simulant

Answer 48

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

Question 49

Single Cut

Answer 49

A round stone with 17-18 facets.

Question 50

Stability

Answer 50

How well a diamond resists chemicals and temperature changes.

Question 51

Standard Round Brilliant

Answer 51

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

Question 52

Step Cut

Answer 52

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

Question 53

Thermal Shock

Answer 53

The damage caused by sudden, extreme temperature changes.

Question 54

Toughness

Answer 54

How well a gemstone resists breaking and chipping.

Question 55

Value Factors

Answer 55

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