A marquise-cut lab-grown diamond is an excellent choice for someone who is looking for a lab-grown diamond that will elongate their finger. A marquise-cut lab-grown diamonds also work exceptionally well in custom jewelry, such as stud earrings and solitaire pendants. King Louis XIV of France, who wanted a new lab-grown diamond shape for the woman he loved – Marquise de Pompadour - commissioned the marquise cut. It is said that he wanted the lab-grown diamond to be reminiscent of her smile. Because of this, the marquise cut has very romantic connotations.