Ok I have to explain why I think it's ivory.
All the Indian power flasks made that way, are made of ivory;
but most of them are decorative objects, not even with a hole to pour the powder.
Many Indian toradors made of mother-of-pearl are late 19th or early 20th and they are just decorative.
It's the reason why I think that this torador is made of ivory but just as a decorative item from 1900.
Sometimes they use old barrels, so I was intrigued to see more of this gun...
