oldhamite

== English == === Etymology === From Oldham +‎ -ite. === Noun === oldhamite (plural oldhamites) (mineralogy) The mineral form of calcium sulphide. === Further reading === David Barthelmy (1997–2026), “Oldhamite”, in Webmineral Mineralogy Database. “oldhamite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026. === Anagrams === ethmoidal, methiodal