Gieseckite

1 definition found

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

  Gieseckite \Gie"seck*ite\, n. [Named after Karl Giesecke.]
     (Min.)
     A mineral occurring in greenish gray six-sided prisms, having
     a greasy luster. It is probably a pseudomorph after
     el[ae]olite.
     [1913 Webster]