The Collaborative International Dictionary of English v.0.48:

Almandine \Al"man*dine\, n. [LL. almandina, alamandina, for L.
   alabandina a precious stone, named after Alabanda, a town in
   Caria, where it was first and chiefly found: cf. F.
   almandine.] (Min.)
   The common red variety of garnet.
   [1913 Webster] Alme

WordNet (r) 3.0 (2006):

almandine
    n 1: a purple variety of the ruby spinel
    2: a deep red garnet consisting of iron aluminum silicate [syn:
       almandite, almandine]