tusionite

== English == === Etymology === From Tusion +‎ -ite, after the Tusion River Valley in Tajikistan. === Noun === tusionite (uncountable) (mineralogy) A rare trigonal borate mineral. === Further reading === David Barthelmy (1997–2026), “Tusionite”, in Webmineral Mineralogy Database. “tusionite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.