Length-to-width ratio is defined as

Length-to-width ratio is defined as

• A. The ratio of the table width to the overall diameter
• B. The distance between girdle and culet
• C. A numerical expression of the relationship between the length and width of a fancy cut, where the value for width is one.
• D. The ratio of crown height to pavilion depth

Answer: (C)

The length-to-width ratio describes the overall silhouette of a fancy-cut diamond by comparing how long it is to how wide it is. It is defined as a numerical expression of the relationship between the length and width of a fancy cut, where the width is normalized to one. To determine it, measure the longest dimension of the stone as the length and the widest dimension perpendicular to that as the width, then divide length by width. Because width is set to 1, the ratio directly shows how elongated the shape is: higher values indicate a more stretched outline (like a marquise or oval), while lower values indicate a shorter, broader look. This concept specifically applies to fancy cuts and differs from other proportions like pavilion depth, crown- to pavilion-proportions, or table width-to-diameter, which describe different aspects of a diamond’s geometry.

The length-to-width ratio describes the overall silhouette of a fancy-cut diamond by comparing how long it is to how wide it is. It is defined as a numerical expression of the relationship between the length and width of a fancy cut, where the width is normalized to one. To determine it, measure the longest dimension of the stone as the length and the widest dimension perpendicular to that as the width, then divide length by width. Because width is set to 1, the ratio directly shows how elongated the shape is: higher values indicate a more stretched outline (like a marquise or oval), while lower values indicate a shorter, broader look. This concept specifically applies to fancy cuts and differs from other proportions like pavilion depth, crown- to pavilion-proportions, or table width-to-diameter, which describe different aspects of a diamond’s geometry.