Thank You @Rebecca Kusek for your answer. Princess cut diamond is definitely popular, I will also love to know which diamond will you prefer?
What is the difference between rough diamonds and polished diamonds? How do I know the quality of rough diamonds?
Yes a diamonds beauty greatly depends on cut than any other factor. In simple words, if a diamond does not catch your eye or it doesn't flash in light it can be labeled as not well cut. source: http://goo.gl/9B2OWF