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 Post subject: Re: Curious beryl
PostPosted: Thu May 16, 2013 10:21 am 
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Here is a color corrected image. Is this accurate, Isi?

Jason

Attachment:
beryl005.jpg
beryl005.jpg [ 20.65 KiB | Viewed 885 times ]

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 Post subject: Re: Curious beryl
PostPosted: Thu May 16, 2013 10:52 am 
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Any sense of what the chromophore(s) is causing the color?


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 Post subject: Re: Curious beryl
PostPosted: Thu May 16, 2013 3:48 pm 
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Jason : Yes. Very accurate. Thank you.

Barbra : No... Maybe a higher concentration in Fe than usual ?


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 Post subject: Re: Curious beryl
PostPosted: Thu May 16, 2013 11:26 pm 
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In the specimen that I had, I didn't detect iron absorption with the spectroscope....I suspect the main chromophore was vanadium.


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 Post subject: Re: Curious beryl
PostPosted: Fri May 17, 2013 9:41 am 
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I can try to double-check my beryl with spectroscope next week. But I don't know how the gold setting can interfere with results. I made all possible analysis when I brought back this stone in France, before I gave it to the jeweler to be set. But it was five years ago and honestly my observations are no longer fresh in my memory.


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 Post subject: Re: Curious beryl
PostPosted: Tue May 21, 2013 5:59 pm 
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Remember Ian, CEO of Gemfields, said in a speech and afterward questioning, that zambian emeralds are colored primarily by iron and some chromium and when I contacted Gemfields directly, they also said the emeralds were colored by iron and some chromium.
Was vanadium found at Kagem?

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