Which three major parts make up a polished diamond?

A polished diamond consists of three major parts: the crown, pavilion, and girdle.

The crown is the upper portion of the diamond that is above the girdle, which is the widest part of the diamond. The crown is responsible for the brilliance and sparkle of the diamond, as it is where light enters and reflects off the facets.

The pavilion is the portion below the girdle that extends downwards to the culet, which is the bottom point of a diamond. The pavilion also plays a crucial role in how light interacts with the diamond, influencing its brilliance and fire.

The girdle serves as the boundary between the crown and pavilion, acting as a sort of “equator” for the diamond, allowing it to be set securely in jewelry.

This structural understanding is essential for evaluating the diamond's cut quality and overall visual impact. The other options do not accurately reflect the primary segments that define the shape and light performance of a polished diamond.