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]

WordNet (r) 3.0 (2006):

marbleized
    adj 1: patterned with veins or streaks or color resembling
           marble; "marbleized pink skin" [syn: marbled,
           marbleized, marbleised]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "marbleized":
   banded, barred, brinded, brindle, brindled, listed, marbled,
   streaked, streaky, striatal, striate, striated, strigate, strigose,
   striolate, striped, stripy, tabby, veined, watered