Vrbaite (symbol: Vrb) is an opaque to subtranslucent brittle mineral with chemical formula Tl<sub>4</sub>Hg<sub>3</sub>Sb<sub>2</sub>As<sub>8</sub>S<sub>20</sub> and pyramidal crystals. It is names after Czech mineralogist . It is bluish white with red internal reflections and dark red in translucent thin fragments. It is classified in the class "sulfides and sulfosalts".
Type locality: Allchar deposit, , Kavadarci Municipality, North Macedonia.