GIA-DDG 16 Flashcards
The slightly curving center of the long side of a pear, marquise, heart, or oval is called what?
Belly
A dark area across the center of an elongated brilliant cut
Bow-Tie
A cutting style in which triangular and kite-shaped facets radiate from a gem’s center toward its girdle
Brilliant Cut
The arrangement of a gem’s facets
Cutting Style
Any gemstone shape other than round
Fancy Cut
A faceting style that replaces the large bezel facets at the points of marquises, pears, and hearts with a star and upper girdle facets
French Tips
A numerical expression of the relationship between the length and width of a fancy cut where the vallue for width is one
Length-to-Width ratio
A cutting style that combines step-cut and brilliant-cut facets
Mixed Cut
Outward curve of the pavilion facets of a step-cut diamond
Pavilion Bulge
A diamond’s overall attractiveness in relation to others of the same shape and cutting style
Shape Appeal
A cutting style with long, narrow, four-sided facets in rows parallel to the girdle on both the crown and pavilion
Step cut
On an emerald-cut diamond, very narrow corners should be noted under
Proportions, as a shape-appeal factor
Where on a fancy-cut diamond might multiple facet reflections make it most difficult to detect clarity characteristics?
Point
Calculate the length-to-width ratio of the following pear shape:
Length: 7.51 mm
Width: 5.19
Divide Length by Width
Which of the following appears only on fancy cuts?
Keel line
On a marquise-shaped, brilliant-cut diamond, pavilian-angle variations can result in
a Bow-tie
On emerald cuts, differnces in angles of the rows of pavilion facets cause
Pavilion Bulge
Compared to round brilliants, one difference in the color-grading process for fance-cut diamonds is the
Viewing direction
Princess cuts are popular in jewelry designs that call for
Channel settings
The rounded end of a pear-shaped stone is called the
Head
Excessive pavilion bulge on emerald cuts results in
Excess weight
The slightly curved, central areas on the sides of some brilliant fancy cuts are called
Bellies
To calculate the table percentage of a fancy cut, divide the width of the table by the stone’s
width
When you judge a diamond’s shape appeal, you consider
whether or not its shape is graceful and pleasing
What’s considered under symmetry when grading a pear-shaped diamond
Culet placement
