Artificial intelligent assistant

asteria

aˈsteria
  [L.]
  A precious stone mentioned by Pliny; either the Asteriated sapphire (see below) or Cymophane. Cf. astroite, asterite.

1646 Sir T. Browne Pseud. Ep. 137 Asteria, or some kinde of Lapis stellaris. 1874 Westropp Prec. Stones 66 Asteria..is undoubtedly the cymophane, or chrysoberyl cat's-eye.

Oxford English Dictionary

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