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Old 3rd August 2009, 11:14 PM   #17
Rick
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This is a petrified material; is it not ?

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*Sorry, I missed Alan's post on this .

Wouldn't the color be determined by the mineral content of the strata it was buried in ?

Last edited by Rick; 4th August 2009 at 12:13 AM. Reason: Addendum
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