Which of the following best describes the term "full-cut" in relation to diamonds?

The term "full-cut" in relation to diamonds specifically refers to the cutting style designed to maximize light return, which is essential for enhancing the beauty and brilliance of a diamond. A full-cut diamond typically incorporates a particular arrangement of facets that optimizes the reflection and refraction of light, allowing the stone to display a sparkling appearance.

This description encompasses the full-cut diamond's characteristic of having a specific number of facets (usually 58) arranged in a way that promotes light performance, but the emphasis here is on the purpose of this cutting style—to achieve the best light return rather than merely counting facets or discussing other attributes.

While a diamond can weigh over 1 carat, that attribute has no relation to the cutting style being described. The number of facets is specific to certain cuts but does not entirely represent the intent of the cut, and a diamond’s shape, while relevant for aesthetics, does not define a "full-cut." Thus, the correct option highlights the key objective of the cut, which is to enhance the diamond's brilliance through optimal facet arrangement.