Gemstone Windowing: What It Is and How to Spot It

Rokero Gems Editorial · Updated 4 October 2026

Learn what gemstone windowing is, why it happens and how shallow proportions can affect face-up appearance.

Windowing is a transparent-looking area, usually near the centre, where light passes through instead of returning strongly to the viewer.

It is often related to pavilion proportions and the optical properties of the gem material.

A window is not automatically a reason to reject a rare stone, but appearance, rarity and price should make sense together.