Mike, I was a wildlife person and will tell you this is a Ebay twisting of the facts. There are easy ways to tell ancient ivory from modern. I think they are really saying they can't tell ivory from other stuff just by photos. So all the stuff is getting the Ebay axe. Doesn't help you any but those likely are the real facts. Let me go find the place this is all explained just so people reading of your troubles will get some facts. 300
These are for folks who want to know about ivory, I can't change Ebay, I can give you info to know what your looking at when at knife and gun shows. If you go there click on the subjects in blue.. The science talk is heavy but there is good info there.
http://www.fws.gov/lab/ivory_id.php#top
300Bucks opinion on ivory...elephants are getting poached ( demand is greatest in non-USA areas). I have yet to see a Mastadon or a Mammoth walking the face of the earth.
Buckman110, I have seen real water buffalo with white streaks, I have two real American buffalo horns, due to the curve and thinness you would be hard pressed to find much 'thick' horn to cut into slabs. I have not polished mine so can't testify if any white is included. Because they are hollow they make better black powder horns and spoons than knife handles. After the buffalo is dead a spell you just walk up and jerk the horn sheath off the bone core. That is why you see Buff skulls with the bone horns.