My bookend elephants

I have no idea where these came from but they were given to me by my mother. Her girl friend gave them to my mother because she was good to her in her later years. This woman told my mother that if things got bad she always had her elephants to sell. She was married to a movie star and traveled around the world. Milton Burl I believe. I would like to know if they are jade unpolished or milk stone. They do have alot of jade coloring through them.