Stylistically speaking, I'd say it looks to be Inuet (sp?) or other Native American made from the upper Canadian/Alaskan area. Just a guess though - but the smoother, rounded shape of the "face" on the handle end sure looks right.
I would agree that it's not a knife, but more of a spear or harpoon type of tool. The bone tip for piercing of some sort, and the handle end with a hook for pulling things towards you. The 'nose' could also possibly serve some purpose (prying maybe?)
My best guess is it's a native made souvenir, bought on someone's trip up north in the last 30-50 years. Just like you find dream catchers all over the Southwest. Could be worth some money, or could just be a tourist's trinket.
This of course, is all just a best guess.