Min. [f. Gr. σπίλος spot, speck + -ITE1 2 b.] (See quot. 1885).
1882. Geikie, Text-bk. Geol., IV. viii. 578. Fleckschiefer, Bandschiefer,… the spilosite and desmosite of Zincken. Ibid. (1885), (ed. 2), II. ii. 127. Spilosite is a greenish, schistose rock, composed of finely granular or compact felspathic material, with small chlorite concretions or scales.
1895. L. Fletcher, Introd. Study Rocks (1898), Index 118/1.
