# What is the element whose sulfide is known as "stibnite"?

$\text{Antimony, Sb}$?
Anitmony has been known and used since antiquity as its $\text{sulfide,}$ "Sb_2S_3, i.e. $\text{stibnite}$. It was used as face paint, i.e. $\text{kohl}$ or $\text{mascara}$, by the ancient Egyptians. Modern mascaras have thankfully adopted other formulations.