A by product of its manufacture was a light greyish blue pigment called Ultramarine Ashes which was actually the remains of the stone with the ultramarine removed.

Although chemically identical to the synthetic Ultramarine, genuine lapis pigment has a different crystalline structure when viewed under a microscope. This gives it a particularly beautiful appearance and there are still a small number of painters who use the genuine article. The pigment is still made in the hills of Afghanistan. The last time I checked the oil paint was selling for about $400 for a tiny 5ml tube.

For a full list of pigments, see: Artists Pigments.