The Collaborative International Dictionary of English v.0.48:
Variegate \Va"ri*e*gate\, 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.
The shells are filled with a white spar, which
variegates and adds to the beauty of the stone.