Source : Webster's Revised Unabridged Dictionary (1913)

Stilpnomelane \Stilp*nom"e*lane\, n. [Gr. stilpno`s shining +
   me`las, -anos, black.] (Min.)
   A black or greenish black mineral occurring in foliated
   flates, also in velvety bronze-colored incrustations. It is a
   hydrous silicate of iron and alumina.