Rare museum piece aboriginal artifact

Hi . I have a very rare item from a collection of ancient cultures artifacts from several indigenous cultures. The quality of all the items had at one stage been exhibited in museums. I am selling am ancient aboriginal artifact from the central dessert region in Australia. It is a tool used for plying bark of trees to make canoes. It has a message circle and another special marking. It is very clearly a tool with a well worn handle that your fingers fit in perfectly and s very strong it's defin