What are the popular diamond shapes?

The round brilliant remains the most popular shape followed by the cushion and princess cut. Step cuts like emerald and asscher have an elegant, subtle shine. If you like the rectangular shape of an emerald cut but want more flash, go for a cushion with a ratio above 1.10 or a radiant. Pears and ovals help elongate the finger while setting a marquise east/west is a nice twist on a classic.