The pearls of de Sluze were a beautiful 17th century necklace famed across Europe for their purity and exquisite craftmanship.

...No, I'm lying, the pearls of de Sluze are really another family of plane algebraic curves, studied by de Sluze (see also the conchoid of de Sluze).

The family depends on integers n,m,p and real numbers a,b. The equation for a curve in the family is
yn = a(b-x)pxm

History seems to be silent on the subject of de Sluze's jewellery.

The true historical information was sourced from, the lies I made up myself.