leptynite

from 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]

from 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]