holdawayite

== English == === Etymology === From Holdaway +‎ -ite, after the American petrologist Michael Jon Holdaway (1936–2025). === Noun === holdawayite (plural holdawayites) (mineralogy) A manganese hydroxyl-carbonate mineral. === Further reading === David Barthelmy (1997–2026), “Holdawayite”, in Webmineral Mineralogy Database. “holdawayite”, in Mindat.org‎[1], Hudson Institute of Mineralogy, 2000–2026.