Lewis & Short

hēlĭŏtrŏpĭum, ii, n., = ἡλιοτρόπιον.

  1. I. The plant turnsole, heliotrope, Varr. R. R. 1, 46; Plin. 2, 41, 41, § 109; 22, 21, 29, § 57.
  2. II. A precious stone with green and brown streaks, striped jasper, Plin. 37, 10, 60, § 165.
    Called also: hēlĭŏtrŏpĭos (gemma), Mart. Cap. 1, § 75: heliotropius lapis, Prisc. Perieg. 254.