The Core Models are Indian Rosewood. The Wood Library ones can be whatever the Dealer selects, typically we have seen Ebony or Brazilian Rosewood. I have seen one dealer do Cocobolo on DC 594's (Wild West).
They can also select Rosewood or Maple Necks, or even Korina Necks, or Korina Necks and bodies. Righteous Guitars did a run of DC 594's with Korina Bodies and Necks with Brazilian Boards, they were AWESOME, I owned two but have since sold them as I have shifted my collection to be more SC-centric. Righteous Guitars does have a run of SC's on order as well with the Korina Necks and bodies. Moore Music Guitars has a run on order with Korina Necks and Mahogany bodies.