hardystonite

== English == === Etymology === From Hardyston +‎ -ite, after Hardyston Township, New Jersey. === Noun === hardystonite (uncountable) (mineralogy) A rare purple fluorescent silicate mineral. === Further reading === David Barthelmy (1997–2026), “Hardystonite”, in Webmineral Mineralogy Database. “hardystonite”, in Mindat.org‎[1], Hudson Institute of Mineralogy, 2000–2026.