The Collaborative International Dictionary of English v.0.48:

Asteriated \As*te"ri*a`ted\, a. [See Asterias.]
   Radiated, with diverging rays; as, asteriated sapphire.
   [1913 Webster]

WordNet (r) 3.0 (2006):

asteriated
    adj 1: (of some crystals especially gemstones) exhibiting
           asterism