nacrite Min.
(ˈneɪkraɪt)
[f. nacre + -ite1 2: named by A. Brongniart, 1807.]
A mineral occurring in pearly scales.
Thomson's nacrite is not the same as Brongniart's.
| 1808 Allan Mineral Nomencl. (ed. 2) s.v. 1816 Jameson Min. (ed. 2) I. 524. 1836 T. Thomson Min., Geol., etc. I. 245 This mineral occurs usually in mica slate, taking the place of the mica; so that the rock..constitutes a mixture of nacrite and quartz. 1876 Harley Mat. Med. (ed. 6) 127 Potash is found in most of the alkaline-earthy minerals, as mica, felspar, leucite, and nacrite. |