luddenite

== English == === Etymology === From Ludden +‎ -ite, after Raymond W. Ludden, chief geologist, Phelps-Dodge Corporation. === Noun === luddenite (mineralogy) A monoclinic nickel green mineral containing copper, hydrogen, lead, oxygen, and silicon. ==== References ==== David Barthelmy (1997–2026), “Luddenite”, in Webmineral Mineralogy Database.