A common misunderstanding is that the term ‘diamond cut’ would also refer to the diamond’s shape. However, cut is what determines how well-cut your diamond is, whereas shape is the shape it was cut into. Diamonds can be cut into various shapes of which the round brilliant is probably the best known.  All others are known as fancy shapes. Traditional fancy shapes include the marquise, pear, oval and emerald cuts. Hearts, cushions, triangles and a variety of others are also gaining popularity in diamond jewelry.

Smith's Jewelers stocks a wonderful collection of the most popular shapes of diamonds.