Yup, it's an antler.  Don't know from what species though.
The tooth in my hand is hollow btw; so I don't think it's a claw.  
I know crocodile teeth is hollow.  A Dayak showed me one tooth from a freshwater croc they accidentally caught in a fishing net - in Kalimantan, not Nias.
I wonder which endangered species are represented on this balato  
