gratonite

== English == === Etymology === This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term. ? + -ite === Noun === gratonite (mineralogy) A trigonal-ditrigonal pyramidal mineral containing arsenic, lead, and sulfur. ==== References ==== David Barthelmy (1997–2026), “Gratonite”, in Webmineral Mineralogy Database.