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Labs who can determine copper status in tourmaline

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Ideal_Rock
Joined
Aug 15, 2004
Messages
5,537
I've found a very pretty tourmaline, but I want to know if it is cuprian. Can you suggest a lab that will determine this?
 

LD

Ideal_Rock
Premium
Joined
Jun 29, 2008
Messages
9,717
I think that most can.

I don't know what stone you're referring to but just bear in mind that even if a tourmaline has copper in it and therefore may be Cuprian this DOESN'T mean it would be considered to be "Paraiba" or "Paraiba like". Colour and the right composition is the determining factor. I've seen lab reports that state something like "this stone could be considered a "Paraiba" or something like that but they've been shocking and the only thing linking them to a proper Paraiba has been the copper content as nothing else about the stone radiated Paraiba.

Are you experienced with a loupe and looking at inclusions? If so, you may be able to see copper needles and sift them out from other inclusions.

Hope that makes sense!
 

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Ideal_Rock
Joined
Aug 15, 2004
Messages
5,537
Thanks, LD
 

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Ideal_Rock
Joined
Aug 15, 2004
Messages
5,537
N/M The vendor came back saying no copper, just "pariaba like." These pictures need to be strung up!!
 
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