Used Davis powered "Moss Green" stain. Just add small quantity in your tufa while you are mixing. The green dye was a little more expensive that the other colors Davis sells, but had to try it. Adding more stain and the color is darker. BTW I used white portland when making this. Bottom tufa "stand" was made with white as well.

The black dye used in the top section is the liquid dye from quickcrete.

{{gwi:65866}}

Here is a link that might be useful: Davis