variegate \va"riegate\, v. t. imp.  p. p. variegated; p.
   pr.  vb. n. variegating. l. variegatus, p. p. of
   variegare to variegate; varius various + agere to move, make.
   see various, and agent.
   to diversify in external appearance; to mark with different
   colors; to dapple; to streak; as, to variegate a floor with
   marble of different colors.
   1913 webster

         the shells are filled with a white spar, which
         variegates and adds to the beauty of the stone.
                                                  --woodward.
   1913 webster
see also:
variegated variegating various agent