Source : Webster's Revised Unabridged Dictionary (1913)

Balas ruby \Bal"as ru`by\ [OE. bales, balais, F. balais, LL.
   balascus, fr. Ar. balakhsh, so called from Badakhshan,
   Balashan, or Balaxiam, a place in the neighborhood of
   Samarcand, where this ruby is found.] (Min.)
   A variety of spinel ruby, of a pale rose red, or inclining to
   orange. See {Spinel}.

Source : WordNet®

balas ruby
     n : a pale rose-colored variety of the ruby spinel [syn: {balas}]