ComparetheDiamond.com (formerly diamondgeezer.com) offer all the different diamond cuts. The cut of a diamond determines its shape & brilliance. The different diamond cuts include; round brilliant, princess, emerald, marquise, pear, heart, radiant, cushion & oval.Round Brilliant-Cut Diamonds: Round brilliant-cut diamonds are the most popular style of diamond to buy, especially for an engagement ring. Round brilliant-cut diamonds have 58 facets. Facets are the natural or un-natural cuts in a diam...