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15 Cards in this Set
- Front
- Back
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Which of the following is part of an evaluation of proportion symmetry? A. Wavy girdle B.Scratches C.Non-pointing facets D.Rough girdle |
A. Wavy girdle
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Calculate an estimated total depth percentage for a round brilliant diamond with the following proportions: Crown height percentage: 12.5% Girdle thickness percentage: 3.0% Pavilion depth percentage: 43.0% |
58.5% |
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The proportions that play the biggest role in determining a round brilliant diamond’s brightness are table percentage, crown angle, and |
pavilion angle.
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The purpose of the culet facet is to |
B. prevent chipping.
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Which of the following pavilion depth percentages would most likely cause the girdle reflection to be visible face-up through the table? A.45.0% B.42.0% C.48.0% D.37.0% |
37.0% |
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Calculate an estimated total depth percentage for the following stone: Average girdle diameter: 4.45 mm Crown height percentage: 15.5% Girdle thickness percentage: 7.0% Pavilion depth percentage: 45.5% |
68.0%
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If a diamond’s culet is too large, it will look like |
a small cavity.
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A diamond with variations in alignment probably also has |
misshapen facets.
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Most diamonds have some symmetry variations |
but they rarely affect appearance.
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If a diamond’s pavilion depth percentage is 39.0 percent, its pavilion angle is approximately |
38.0º
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The care that goes into the fashioning of a polished diamond, as confirmed by its finish, is its |
polish |
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As a diamond’s pavilion gets deeper, its table reflection becomes |
larger |
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Large, very large, or extremely large culets should be considered when determining A.symmetry. B.clarity. C.polish. D.pavilion depth percentage. |
pavilion depth percentage.
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A diamond’s physical shape, including its proportions and durability, determined by decisions made during the fashioning process, is its |
design |
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A diamond with a thick girdle, steep crown, or deep pavilion represents poor value because A. it appears smaller face-up than its weight suggests. B.it doesn’t look attractive. C.its proportions create durability problems in the polished stone. D.it can’t be set into a jewelry piece. |
it appears smaller face-up than its weight suggests.
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