diamond shapes

First and foremost, a diamond's "shape" should not be confused with a diamond's "cut." While the term "Cut" is frequently used to describe it's shape, it should be remembered that when a diamond jeweler (or a diamond certificate) says "cut," that is a reference to the diamond's reflective qualities, not it's shape. The shape refers to the general outward appearance of the diamond, (such as round, emerald, or pear).

This illustration shows the traditional shapes of diamonds that are used in the jewelry industry today. The "brilliant-cut" was created at the end of the 17th century and was represented by several forms of faceted diamonds. These cuts were round, rounded or cushion-shaped in girdle outline. During the early 18th century, Brazil gave rise to the cushion-shaped old-mine cut, a forerunner of the modern brilliant cut having 33 crown and 25 pavilion facets, the same 58 facets as today's round brilliants.