Fig,
I used an off-white Behr semi-gloss paint for the base coat. I applied two coats of that, sanding it down after each coat dried.
I then had a quart of hunter green paint mixed, again using a Behr semi-gloss. I mixed the hunter green with a gallon of Behr's Faux Glaze and applied the combined mixture with a sponge roller. Basically to get the effect you just roll in on any way you choose - in other words don't roll only up and down, but roll side to side once, then up and down, then diagonal, etc.
It produces an effect close to a sheet of marble...it's not clear via the pics, but the glaze gives the paint a definite sheen to it.
RTSDaddy2