With the exception of the background color and the reversing of the color used in the veining – Black marble with white veining and white marble with black and gray veins are so much alike that the same description will do for each of them.
They are veined marbles, and many specimens show fissures which for the sake of naturalness and variety may be imitated but very sparingly, as really it is a defect.
This one of the most common marbles, and the painter has frequent occasions to imitate it, but it rarely requires much skill to distinguish between the stone and the imitation.
It is generally supposed to be a very easy matter to imitate white veined marble, but it requires some thoughtful training to do it well.
The background for this marble is a pure white or black. While the color is wet, form the veins with a feather, and use a softener to blend the veins in with the background.
A few white blotches and main white coarse veins are left. When dry the pure white veins must be touched in order to bring them out.
For the black-veined variety the white background is gone over here and there,but not too much of it, with a touch of black which must be vigorously worked into the white to produce a few blotches of light, faint gray (not prominent at all).
The veining is gray of a trifle darker tone and as a contrast to the white of the ground.
Marble Veining Feathers