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Removal of Biotite matrix from Emerald rough

Hi,

I've read a few postings on mechanical means of accomplishing this but has anyone had success with chemical/acid means? I've read that biotite is soluble in sulfuric acid. Any info on this route would be appreciated.

Regards,
Chris

From Chris DeMille - October 26, 2007 at 14:56:19
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Message: 65221

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