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Transvaalite
Transvaalite n. 
/trɑːnsˈvɑːlaɪt//træns-//-nz-/ [-ite suffix1 2] Mineralogy a mineral consisting mainly of black oxide of cobalt, resulting from the alteration of cobalt arsenide, found at a cobalt-mine near Middelburg in Mpumalanga province (formerly a part of the Transvaal).
/trɑːnsˈvɑːlaɪt//træns-//-nz-/ [-ite suffix1 2] Mineralogy a mineral consisting mainly of black oxide of cobalt, resulting from the alteration of cobalt arsenide, found at a cobalt-mine near Middelburg in Mpumalanga province (formerly a part of the Transvaal).ΘΚΠ
the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > other oxides > oxides of cobalt
heterogenite1872
Transvaalite1890
stainierite1930
1890 MacGhie & Clark in Engin. & Mining Jrnl. (N.Y.) L. 96 Transvaalite.
1896 in A. H. Chester Dict. Names Minerals
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