Culet size can affect which pavilion dimension, potentially differing from its visual appearance?

• A. Table width
• B. Girdle thickness percentage
• C. Pavilion depth percentage
• D. Culet size

Answer: (C)

Culet size sits at the bottom of the diamond and is part of how the lower portion, the pavilion, is formed. The pavilion depth percentage measures how tall the pavilion is relative to the stone’s diameter, specifically from the girdle down to the culet. When you alter the culet size, you’re changing how much of the vertical depth is allocated to the lower portion. To keep the overall proportions right, the cutter adjusts the pavilion height, so the measured pavilion depth percentage can shift. That means the culet can make the pavilion appear deeper or shallower in measurements, even if the culet’s visual size looks different. The table width and girdle thickness are governed by other features and aren’t directly dictated by culet size. So the dimension most affected by culet size is the pavilion depth percentage.