Which of the following is a characteristic of a bezel setting?

A bezel setting is characterized by the way it secures the gemstone in place. In this type of setting, the stone is surrounded by a thin metal rim, or "bezel," that holds it securely while also providing a protective edge. This design enhances the durability of the piece, as the metal surrounds and safeguards the stone from impacts and chipping.

The other options do not accurately describe the bezel setting. The claim that the setting uses no metal at all contradicts the fundamental aspect of bezel settings, which rely on metal to secure the stone. The idea of stones being placed asymmetrically is more associated with artistic or modern designs rather than the structured nature of a bezel setting, which generally aims for a symmetrical and balanced appearance. Lastly, while a bezel setting can allow light to enter the stone, the characteristic that it primarily emphasizes is the protection and security of the stone rather than maximizing light exposure, which is more typically associated with other types of settings, like prong settings.