iddingsite

== English == === Noun === iddingsite (countable and uncountable, plural iddingsites) (mineralogy) A mixture of clay minerals and iron oxides formed by alteration of olivine === Further reading === David Barthelmy (1997–2026), “Iddingsite”, in Webmineral Mineralogy Database. “iddingsite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.