The Round/Brilliant cut is the most popular and resembles that of a cone and provides maximized light return through the top of the diamond.
The face-up shape of the Princess cut is square and the profile or side-on shape is similar to that of an inverted pyramid with four beveled sides.
The Oval cut is very similar to a Round except it is elliptical. It was invented by Lazare Kaplan in the early 1960s. It usually has 56 facets.
The Marquise or navette cut is like a long oval which has been stretched out to a point at each end. This cut should have an aspect ratio of 2:1 for the classic boat shaped stone.
The Heart cut is essentially a pear-shaped cut with a cleft at the top containing 59 facets. The shape of the heart makes this diamond highly desirable for romantic occasions.
The Emerald cut is a rectangular or square shape with truncated corners and stepped facets, typically parallel to the girdle (side edge).
The Pear cut is also known as the teardrop shape owing to it's resemblance. It is considered as a hybrid between the marquise cut and the round brilliant diamond.
The Asscher cut is a stepped square cut, often called the 'square emerald cut' and like an emerald cut, the Asscher has cropped corners.
The Cushion cut is a four sided deep square or rectangle cut with rounded edges and large facets - it has a cushioned shaped girdle.
The Trilliant or Trillion cut is a triangle shape diamond, which is three sided with a total of 31 facets. There are two different variations of this cut.
The Baquette cut is an elongated version of the Emerald cut and is commonly found in eternity rings, cluster rings and diamond set shoulders.
The Radiant cut is a square or rectangular shape with clipped corners combining the elegance of the emerald shape with the brilliance of the round shape.