griqualandite Min.
(ˈgriːkwəlændaɪt)
[Named by Hepburn, 1887, from its locality, Griqualand.]
A mineral consisting essentially of silica in a fibrous form, more or less impregnated with iron, forming the gem known as tiger eye.
| 1887 Chem. News LV. 240 Griqualandite, a pseudomorph of crocidolite. |