The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

marbleizing \marbleizing\ n.
   A texture like that of marble.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

marbleizing
    n 1: a texture like that of marble [syn: marbleization,
         marbleisation, marbleizing, marbleising]