Hello, 
Thank you all !! , 
interesting comment about whale blubber ( I didn't know these kind of knives-tools ) 
Yes the blade is pretty thick with diamond profile, 
made for cut and stab like a spear head, but seems really not easy to use  ! 
not well balanced at all, the tip is heavy. 
It could be used making large circles moves / dance ? ) 
( Maybe an early ritual-votive weapon ? )
		 
		
		
		
		
		
		
		
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