Which statement about pavilion depth percentage estimates is true for grading and appraising?

• A. It is never accurate
• B. It is always exact
• C. It is usually accurate enough for grading and appraising
• D. It is irrelevant for grading

Answer: (C)

Grading and appraising diamonds relies on practical proportions rather than perfect precision. Pavilion depth percentage estimates help gauge cut quality, but small differences in measurement fall within acceptable tolerances and don’t drastically change the overall grade or value. Because of that, these estimates are usually accurate enough to support grading decisions and appraisal values. The other ideas aren’t correct because pavilion depth matters for light performance and symmetry, and you don’t need exact decimal precision in standard grading due to measurement limits and variability in estimation.