How to create a new shader/ a new group for my ring?

lord Adam

Hello guys!
This time I would like to know how can I create a new master shader for my 3D object (OBJ file imported from the web)?
I render final picture in KeyShot 5 and there was a two different surfaces, one for whole ring (I used a gold shader for that part of the ring) and second one for artistic stone. Import option in Carrara pro or Daz Studio gives only one surface for model so my question is how to make a secong layer for the stone??

fixmypcmike

See the link in my sig for adding Surfaces in DS: http://www.daz3d.com/forums/discussion/42088/