Min. [f. EPHES-US, near which it was found + -ITE.] A pearly white lamellar mineral, closely related to margarite.
1851. Amer. Jrnl. Sc., Ser. II. XI. 59. Ephesite [a new species].
1873. Proc. Amer. Phil. Soc., XIII. 387. Ephesite, a mineral of … lamellar structure … resembles white cyanite.
