I spent some time investigating the Aboriginal flint trade. Trade sytems in Aus were extensive, no reason why shark teeth did not reach the central regions. The flint was traded through Cape York and traded far into the Melanesian world.
Also as mentioned earlier various teeth like ivory could be ground into a slicing triangle. One of these knives could be held in a belt/waist band and used at close quater. It might be small but if one was slashed with force across your face or any part of a naked body, it is going to shake your confidence some what.
Love the knife Ron. I am going to have to hunt one.
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