The origin marquise cut dates back to King Louis XV of France the 18th century.
He commissioned a jeweller to design a shape that resembled the lips of his mistress, Jean Antoinette Poisson.
Marquise refers to the rank above a count but below a duke.
Marquise diamonds are also often referred to as navette diamonds, which means little ship in French, because of the marquise diamond’s boat like shape.
The marquise cut gradually developed into the distinctive shapewe see today.