alunogen

== English == === Etymology === From French alun (“alum”) +‎ -gen. === Noun === alunogen (uncountable) (mineralogy) An aluminium sulfate mineral often found on the walls of mines and quarries. ==== Synonyms ==== feather alum hair salt === Further reading === David Barthelmy (1997–2026), “Alunogen”, in Webmineral Mineralogy Database. “alunogen”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.