Hard to tell from a picture Best thing to do is the hot pin test. Take a sewing needle and heat it up till red hot. in an unseen spot probably bottom would be the best try and stick it in if its plastic it will smell like chemicals and go right in. if its Ivory It will not penetrate it. also the smell of Ivory will smell like the dentist during a root canal. If it is real you could be looking at $1,000 and up in my opinion. Even if its fake though it will still be worth a couple hundred dollars. I would do some research of exactly where and when it was purchased that could help.
