An diofar eadar na mùthaidhean a rinneadh air "Iridium"

Ann an [[1803]] lorg [[Smithson Tennant]] iridium còmhla ri [[osmium]] ann an clach-platanum à Ameireaga a Deas.<ref>http://dx.{{iomradh iris | doi.org/ = 10.1098/rstl.1804.0018 | foillsichear = Royal Society | tiotal =XVI. On two metals, found in the black powder remaining after the solution of platina | sloinneadh = Tennant, Esq., FRS | ainm= Smithson | iris = Phil. Trans. R. Soc. Lond. | ceann-là = 1804 | leabhar = 94 | duilleagan = 411–418 | ceann-là_inntrigidh = 2018-11-30}}</ref>

Dh'ainmich e e air a' bhan-dhia Ghreugach ''Ἶρις'', air sgàth 's gu bheil a cho-thàthaidhean dathach.