McGoldrick says marbleizing works best when using food coloring.
From the news-journalonline.com
Marbleizing isn't new, but it's an easy way to tweak an egg.
From the news-journalonline.com
More examples
Make something look like marble; "marbleize the fireplace"
Marbleizing or faux marbling is the preparation and finishing of a surface to imitate the appearance of polished marble. It is typically used in buildings where the cost or weight of genuine marble would be prohibitive. ...
(Marbleizing) A faux finish that creates the illusion of marble.
To give concrete surfaces the look and gloss of marble, through a combination of color layering and finishing techniques.
To paint wood or other material to the have the appearance of marble.