A secondary mineral, as an alteration of stibnite, in antimony deposits
IMA Status:
Valid Species (Pre-IMA) 1843
Locality:
Braunsdorf, near Freiberg, Saxony, Germany. Link to MinDat.org Location Data.
Name Origin:
Name from kermes, a name given from the Persian qurmizq, "crimson" in the older chemistry to red amorphous antimony trisulphide, often mixed with antimony trioxide.
Chemical Formula: 