Marquise

The first marquise shaped diamond was created in the mid 1700s for King Louis XV, to match the shape of his mistress' mouth.
Photo courtesy of Scott Papper, GIA GG, AJP, CM (NAJA), Global Gemology & Appraisals
The marquise brilliant cut diamond is an elliptical shape with pointed ends.

Also known as a navette cut.

The very first marquise shaped diamond is credited to King Louis XV in the mid 1700s, when he had commissioned his court jewelers to create a diamond to match the shape of his mistress, Jean Antoinette Poisson.