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<p>[QUOTE=&quot;mikediamond, post: 611039, member: 1859&quot;]It&#039;s a strike-through error, but I can&#039;t establish the identity of the obstructing material with any certainty.&nbsp; It could be &quot;grease&quot;, since cooked lubricant can get hard and brittle and, when breaking up, create indentations with sharply defined borders.&nbsp; At any rate, it&#039;s not worth slabbing.&nbsp; It&#039;s value would would probably be no more than $25.[/QUOTE]</p><p><br /></p>

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