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Presumed to be "untreatable" I demonstrate a rare parcel of Andamooka "Gem Matrix" opal. Gem matrix is Andamooka matrix opal that doesn't "need" treatment it looks high quality solid gem opal WITHOUT treatment. In the video, I cut, treat and show the incredible quality of this rare opal, which may be the best opal of all!
(Opal from Murray Willis, owner of Australian Opal Mines - it's on the web!)