Min. [f. Gr. στέα-ρ tallow + SCHIST. Cf. F. stéaschiste.] A laminated variety of talc.
1833–4. J. Phillips, Geol., in Encycl. Metrop. (1845), VI. 764/2. The limestone is in thin tortuous beds, and as it were dissolved with the shining slate and steaschist.
1874. Birch, 1st & 2nd Egypt. Rooms Brit. Mus., 74. The greater number [of these scarabæi] are of a white steaschist or steatite.
