randaniteMin.|ˈrændənaɪt| Also -dann-. [f.Randanne, Puy de Dôme, France, its locality + -ite.] (See quots.) 1862Dana Elem.Geol. 67 Randanite, a kind of opal made of infusorial remains.1868Watts Dict.Chem., Randanite, an earthy hydrate of silica, occurring near Pont Gibaud.