Snuff Bottle

I recently bought this from an antique store in California for $40. The woman who sells them was given many different snuff bottles from her mother who collected them. It is about 3 inches tall 2 inches wide. The spoon looks like bone. I think it is glass, but I do not know for sure. There is an engraving in Chinese on the bottom and I would like to know what it says, if anyone can tell me I would greatly appreciate it.

Sveta