Itacolumite

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Itacolumite \It`a*col"u*mite\, n. [From Itacolumi, a mountain of
     Brazil.] (Min.)
     A laminated, granular, siliceous rocks, often occurring in
     regions where the diamond is found.
     [1913 Webster]