Min. Also sphen. [a. F. sphène (Haüy, 1801), f. Gr. σφήν wedge, from the shape of its crystals.] = TITANITE 1.
1815. Aikin, Min. (ed. 2), 137. Sphen. Rutilite…. Colour redish, yellowish, greyish, and blackish brown.
1849. Dana, Geol., vi. (1850), 347. Some minute crystals of sphene.
1879. Rutley, Stud. Rocks, x. 140. Frequently the crystals of sphene appear cloudy or imperfectly translucent.
