The Collaborative International Dictionary of English v.0.48:

Jenite \Je"nite\, n. (Min.)
   See Yenite.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Yenite \Ye"nite\, n. [After Jena, in Germany.] (Min.)
   A silicate of iron and lime occurring in black prismatic
   crystals; -- also called ilvaite. [Spelt also jenite.]
   [1913 Webster]