Bird stones of gravel

Hey y’all
I am wondering why i see bird stone made of granite that is rare according to the site
In Georgia granite is gravel and therefore it is dismissed! Because why? It is gravel! I have found some great pieces made of granite only to be told it is gravel! Granite and gravel same thing in Georgia! It is amazing how much resistance to anyone finding anything that does not have a proper education and such. But then again the educated are not as educated as they think! At least not about the facts of the rocks we find and they find but ignore. Sorry forgot to screen shot.the one i am talking about. Will try and find this piece of gravel (granite) again and post it here.
I have all kinds of stuff made from granite! Thx Judy