Source : Webster's Revised Unabridged Dictionary (1913)

Marbleize \Mar"ble*ize\, v. t. [imp. & p. p. {Marbleized}; p.
   pr. & vb. n. {Marbleizing}.]
   To stain or grain in imitation of marble; to cover with a
   surface resembling marble; as, to marbleize slate, wood, or
   iron.

Source : WordNet®

marbleize
     v : make something look like marble; "marbleize the fireplace"
         [syn: {marbleise}]