colcothar
Noun
Meaning
Polishing rouge; a reddish brown oxide of iron, used in polishing glass, and also as a pigment; -- called also crocus Martis.
Source: Webster's dictionarySynonyms
rouge
emery
polish
file
ochre
wax
rust
abrasive
hematite
ferric oxide
maghemite
ferric iron
iron sesquioxide
red iron oxide
polishing rouge