Hello Hombre,
welcome to the forum. The pommel don't look like ivory to my eyes either. How is the feel inside the hand? Like stone? Like David said it could be clam shell.
Here you can see some of my gunongs:
http://www.vikingsword.com/vb/showth...ghlight=gunong but this isn't the only thread about gunongs, use the search function with the key word "gunong", you will find many informations.
Regards,
Detlef