Which term refers to the distance from girdle plane to culet as a percentage of diameter?

Which term refers to the distance from girdle plane to culet as a percentage of diameter?

• A. Pavilion angle
• B. Pattern
• C. Pavilion bulge
• D. Pavilion depth percentage

Answer: (D)

In diamond anatomy, the distance from the girdle plane to the culet is a measure of how deep the pavilion is. When you express that vertical distance as a percentage of the diamond’s overall diameter, you get the pavilion depth percentage. This term directly describes both the dimension (depth) and the reference unit (percentage of diameter). The other terms refer to different ideas: pavilion angle is an angular measurement, pattern relates to facet arrangement or symmetry, and pavilion bulge describes a curvature characteristic of the lower portion—none of these describe the depth ratio from girdle to culet.

In diamond anatomy, the distance from the girdle plane to the culet is a measure of how deep the pavilion is. When you express that vertical distance as a percentage of the diamond’s overall diameter, you get the pavilion depth percentage. This term directly describes both the dimension (depth) and the reference unit (percentage of diameter). The other terms refer to different ideas: pavilion angle is an angular measurement, pattern relates to facet arrangement or symmetry, and pavilion bulge describes a curvature characteristic of the lower portion—none of these describe the depth ratio from girdle to culet.