I know this isn't 100% archery related, but it's probably 99% flint knapping related.  

Does anyone have an example of one?  I'm trying to determine if what I have is an ancient tapping stone for flint knapping.  It's less than 2 inches in diameter, nearly perfectly round, smooth and made of a white stone, possibly chert or marble.  It was picked up by my Mother in the desert Southwest near the Grand Canyon during a desert walk.

Dan

Never heard of a tapping stone.  Hammerstone is used in knapping although the one you have may be a bit small.  Check with a web site called Paleo Planet. It about 90 % knapping.  There is an archeological site and someone there will tell you what you have, hope this helps.

Thanks

Dan