pentagonite

== English == === Etymology === From the fiveling twins that are common in this material. === Noun === pentagonite (uncountable) (mineralogy) A silicate of calcium and vanadium found in basalts and tuffs === Further reading === David Barthelmy (1997–2026), “Pentagonite”, in Webmineral Mineralogy Database. “pentagonite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026. == Italian == === Noun === pentagonite f (plural pentagoniti) (mineralogy) pentagonite