tephroite

== English == === Etymology === From tephro- +‎ -ite. === Noun === tephroite (countable and uncountable, plural tephroites) (mineralogy) An orthorhombic-dipyramidal mineral containing manganese, oxygen, and silicon. ==== References ==== David Barthelmy (1997–2026), “Tephroite”, in Webmineral Mineralogy Database.