Source : Webster's Revised Unabridged Dictionary (1913)

Cobaltine \Co"balt*ine\, Cobaltite \Co"balt*ite\n. (Min.)
   A mineral of a nearly silver-white color, composed of
   arsenic, sulphur, and cobalt.

Source : WordNet®

cobaltite
     n : a rare silvery-white mineral; important ore of cobalt