Stibium, stibij: siue stibi absolutè, quod græci Stimmiappellant. Plin. A white stone found in siluer mines, good for the cyes. Idem quod antimonium.
Lewis and Short: Latin dictionary
stĭbĭum, ii, n.; also called stĭbi, is, and stimmi = sti/bi, stimmi, antimony, a sulphuret of antimony, stibium, used by women, in the form of powder, to color their eyebrows and eyelashes black; and in medicine, as an eye-salve, Plin. 33, 6, 33, 101; 29, 6, 37, 115; Cels. 6, 6, 6; 6, 6, 8; 6, 6, 12 sq.; Scrib. Comp. 27; 34 al.; Vulg. 4 Reg. 9, 30.