afwillite

== English == === Etymology === Alpheus Fuller Williams (1874-1953) of the De Beers diamond company, and -ite. === Noun === afwillite (plural afwillites) (mineralogy) A calcium hydroxide nesosilicate mineral, occurring as glassy, colourless to white prismatic monoclinic crystals. === Further reading === David Barthelmy (1997–2026), “Afwillite”, in Webmineral Mineralogy Database. “afwillite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.