The round shape lab-grown diamond is the most popular diamond shape, representing approximately 75% of all diamonds sold. Due to the mechanics of its shape, the round diamond is generally superior to fancy diamond shapes at the proper reflection of light, maximizing potential brightness.
Round shape lab-grown diamond cost more on a per carat basis than fancy shapes for two reasons; the demand for round diamonds is very high, and theis relatively low. Because more of the rough stone is lost in the cutting of a round diamond, the cost of each carat retained is higher. A typical round diamond may cost 25-35% more than a similar fancy shape.