Ass #13- Key Terms and Concepts

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Questions and Answers

What is craftsmanship in the context of diamonds?

The care taken in the fashioning of a polished diamond (correct)

The light reflection properties of the diamond

The design of the diamond's shape

The type of materials used in diamond production

Which of the following describes the purpose of a culet in a diamond?

To prevent abrasion and chipping on loose diamonds (correct)

To assist in grading the diamond's value

To enhance the diamond's overall brightness

To influence the diamond's pavilion angle

How is the girdle thickness percentage calculated?

As a percentage of the diamond's pavilion depth

As a percentage of the overall weight of the diamond

As a percentage of the diamond's total carat weight

As a percentage of the average girdle diameter (correct)

What effect does a deep pavilion have on a diamond's appearance?

It generally diminishes its overall brightness Signup and view all the answers

Which factors are emphasized when grading a round brilliant diamond's brightness?

Table percentage, crown angle, and pavilion angle Signup and view all the answers

What does the pavilion depth percentage indicate?

The distance from the girdle to the culet as a percentage of girdle diameter Signup and view all the answers

What is the recommended approach to evaluating a diamond's appearance?

Placing more emphasis on the actual visual appearance Signup and view all the answers

How do thick girdles typically affect a diamond's perceived value?

They can cause the diamond to look smaller face-up than its actual weight suggests Signup and view all the answers

What is typically true of diamonds with poor polish?

They appear dull and hazy regardless of proportions Signup and view all the answers

Which statement is correct regarding the variations in diamond symmetry?

Most diamonds have some symmetry variations that rarely affect appearance Signup and view all the answers

A diamond’s pavilion makes a significant contribution to ............

its brightness and fire Signup and view all the answers

An estimate of a diamond’s pavilion depth percentage is.........

usually accurate enough for grading and appraising. Signup and view all the answers

Generally, the greater the pavilion depth percentage.........

the steeper the pavilion angle. Signup and view all the answers

Including design and craftsmanship in the cut grade gives a well-crafted diamond ......

the recognition it deserves Signup and view all the answers

The angle formed by the pavilion mains and the girdle plane is ...?

Pavilion Angle Signup and view all the answers

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

Finish Signup and view all the answers

The size of the facet at the bottom of the diamond where the pavilion mains meet is .....?

Culet Size Signup and view all the answers

The length of the lower half facets expressed as a percentage of the total distance between the girdle and the culet is .......

Lower Half Length Percentage Signup and view all the answers

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

Design Signup and view all the answers

How do steep pavilion angles affect appearance?

dark in the center Signup and view all the answers

Study Notes

Diamond Key Terms

Craftsmanship: The care taken in polishing a diamond, judged by its finish.
Culet Size: The facet size at the base where the pavilion meets.
Design: A diamond's physical shape, considering proportions and durability.
Finish: The quality of the polish and precision of the cut.
Girdle Thickness Percentage: Girdle thickness as a percentage of the average girdle diameter.
Lower Half Length Percentage: Length of the lower half facets as a percentage of the distance between the girdle and culet.
Pavilion Angle: The angle formed by the pavilion mains and girdle plane.
Pavilion Depth Percentage: Distance from the girdle to the culet as a percentage of the average girdle diameter.

Diamond Key Concepts

A diamond's pavilion significantly affects brightness and fire.
An estimate of pavilion depth percentage is usually accurate for grading and appraisal.
Generally, a deeper pavilion means a steeper pavilion angle.
A culet prevents abrasion and chipping on loose diamonds.
Cuteness design and craftsmanship play a part in the cut grade, signifying quality.
Diamonds with thick girdles, steep crowns, or deep pavilions may appear smaller than expected.
Poor polish can diminish a diamond's appearance.
Symmetry variations in most diamonds have little visual impact.
Table percentage, crown angle, and pavilion angle are crucial for brilliance in round brilliant diamonds.
Diamond value should be assessed by aesthetics alongside numerical parameters.

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