Stibarsen, Arsenic

An old specimen of stibarsen or "allemontite" associated with stibnite from the type locality for allemontite in France. A very old A.E.Foote label is attached to the specimen. See the photo for details? Stibarsen is a compound of arsenic and antimony, that pretty well always occurs associated with native arsenic. A little quartz and calcite included in this specimen, as well.