As I earlier said, there is no ivory there, but that is one beautiful cue.
For future reference, ivory has a distinct grain. Even in a small ferrule, a wide grain will show up. In a buttsleeve, the grain would show up in various spots, if real.
This is one of the more unusual Joss cues though, one I'd like to have. One beautiful piece. If you haven't already paid a measly $900 for this cue, you're crazier than the shithouse rat. Pay it, and get this cue.