---
title: "Pavilion depth: meaning in gemology"
description: "Pavilion depth is the depth of the pavilion, from the girdle to the culet. It is a percentage of the average diameter."
url: https://digitalgemology.com/learn/glossary/pavilion-depth
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[Glossary](https://digitalgemology.com/learn/glossary) · Anatomy and proportions

# Pavilion depth

Pavilion depth is the depth of the pavilion, from the girdle to the culet. It is a percentage of the average diameter.

## In more detail

For a pointed culet it follows from the pavilion angle alone: half the diameter × the tangent of the angle. At 40.8° it is about 43%.

## On a grading report

On the proportion diagram as a percentage. IGI's Ideal band is 42 to 44%.

## Related terms

- [Pavilion angle](https://digitalgemology.com/learn/glossary/pavilion-angle): The pavilion angle is the slope of the pavilion mains, measured against the plane of the girdle.
- [Total depth](https://digitalgemology.com/learn/glossary/total-depth): Total depth is the height of a stone from table to culet as a percentage of its average diameter. It equals crown height + girdle thickness + pavilion depth.
- [Pavilion](https://digitalgemology.com/learn/glossary/pavilion): The pavilion is the cone-shaped part of a cut stone below the girdle. A standard round brilliant has 24 pavilion facets: 8 mains and 16 lower halves.

## Learn more

- [Pavilion angle and pavilion depth: how a diamond keeps the light in](https://digitalgemology.com/learn/diamond-anatomy/diamond-pavilion-angle)
- [Diamond measurements explained: diameter, depth and percentages](https://digitalgemology.com/learn/diamond-anatomy/diamond-measurements-explained)

[All 328 terms](https://digitalgemology.com/learn/glossary)