The Collaborative International Dictionary of English v.0.48:

Pyrope \Pyr"ope\, n. [L. pyropus a kind of red bronze, fr. Gr.
   ?; ? fire + ? the eye, face: cf. F. pyrope.] (Min.)
   A variety of garnet, of a poppy or blood-red color,
   frequently with a tinge of orange. It is used as a gem. See
   the Note under Garnet.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pyrope
    n 1: a deep red garnet used as a gemstone