boracite Min.
(ˈbɒrəsaɪt)
[f. prec. + -ite.]
Native borate of magnesia.
| 1810 Henry Elem. Chem. (1826) I. 619 A natural compound of boracic acid and magnesia..found near Luneburg in Germany, and known by the name of boracite. 1811 Pinkerton Petral. I. 487 [Gypsum] contains..in rare instances arragonite and boracite. |