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					Originally Posted by tanaruz
					
				 
				I did contact an expert on this things. Sent her some pictures. Initially, there's the presence of Schreger lines + crosshatch pattern on the tooth.  
 
And I was advised to bring the item to her for a visual verification. 
			
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 Hi Yves,
Sperm whale tooth shows no Schreger lines so far I know, only elephant ivory shows this lines.
Regards,
Detlef