If a marquise cut measures 9mm X 3mm, what is its length-to-width ratio?

To determine the length-to-width ratio of a marquise cut diamond that measures 9mm by 3mm, you divide the length by the width.

In this case, the length is 9mm and the width is 3mm. This gives you:

Length-to-width ratio = Length ÷ Width

= 9mm ÷ 3mm

= 3

This simplifies to a ratio of 3:1. This means that the length of the marquise cut diamond is three times its width, which is characteristic of its elongated shape. A 3:1 ratio is typical for marquise cuts, as they are designed to enhance the appearance of size and create a unique visual effect with their elongated profile.

Understanding the length-to-width ratio of different cuts can significantly affect how a diamond appears and its desirability. Ratios help categorize the shape and can influence customer preferences when choosing a diamond. In summary, a 3:1 length-to-width ratio is fitting for the marquise cut described, reflecting its design and aesthetic appeal.