Glaucodot is a cobalt iron arsenic sulfide mineral with formula (Co,Fe)AsS.

The cobalt:iron(II) ratio is typically 3:1 with minor nickel substituting.

The locality at Håkansboda, Sweden has rare twinned dipyramidal crystals (see photo).

It occurs in high temperature hydrothermal deposits with pyrrhotite and chalcopyrite.

Glaucodot is classed as a sulfide in the arsenopyrite löllingite group.