hercynite Min.
(ˈhɜːsɪnaɪt)
Also hercin-, hyrcin-.
[Named (1839) Hercynit, f. L. Hercynia (see Hercynian a.).]
Aluminate of iron, found in black octahedral crystals in the Bohemian Forest.
| 1849 J. Nicol Min. 251 Hercynite. 1887 Dana Man. Min. 215 Hercynite, a spinel affording on analysis alumina and iron protoxide, with only 2·9 per cent. of magnesia. |