Hello Artisana, 
 
the material of the sheath is definitely from a moulded material. I know this material since I have handled it time by time in Indonesia. I have seen sheaths and handles from this material. The hot needle test don't work very well by this material because it is very hard and it have a feel nearly like stone. The blade is just a piece of besi (iron) and have nothing to do with a keris. 
Sorry, but I have to agree with the others. 
 
Regards, 
 
Detlef
		 
		
		
		
		
		
		
		
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