jacobsite Min.
(ˈdʒeɪkəbzaɪt)
[f. Jakobsberg, place-name + -ite.]
An oxide of iron and manganese, belonging to the spinel group, found at Jakobsberg in Sweden.
| 1869 Latest News 17 Oct., Jacobsite is a new mineral described before the French Academy of Sciences by M. Damour. 1872 Dana Min. App. i. 8 Jacobsite..does not lose weight when ignited. |