The Collaborative International Dictionary of English v.0.48:

Granulite \Gran"u*lite\, n. [From Granule.] (Geol.)
   A whitish, granular rock, consisting of feldspar and quartz
   intimately mixed; -- sometimes called whitestone, and
   leptynite.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Leptynite \Lep"ty*nite\ (l[e^]p"t[i^]*n[imac]t), n. (Min.)
   See Granulite.
   [1913 Webster]