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 Post subject: Re: Hanneman Tanzanite Filter unexpected results
PostPosted: Thu Apr 25, 2019 7:12 pm 
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If you are near San Francisco, I'll identify it for you.
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 Post subject: Re: Hanneman Tanzanite Filter unexpected results
PostPosted: Thu Apr 25, 2019 7:14 pm 
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Same here in the San Diego area.


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 Post subject: Re: Hanneman Tanzanite Filter unexpected results
PostPosted: Fri Apr 26, 2019 3:04 am 
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In sunny Arizona, but thanks!


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 Post subject: Re: Hanneman Tanzanite Filter unexpected results
PostPosted: Fri Jul 15, 2022 3:57 am 
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mitchnbarb wrote:
Hi,

I am new to the GemologyOnline community.

I have a question I was hoping someone might answer. I have a Tanzanite (seller guarantees it's real, no certificate) that shows light brown under a chelsea filter as it's supposed to, slightly dichroic under calcite dichroscope, but under the Hanneman Tanzanite filter and a strong incandescent bulb, the stone remains dark blue, when it is supposed to pink-ish. I did manage to find one pink relfection of a pavillion facet, but that's all. Can this happen with Tanzanite or is it fake? I do not have a gem refractometer (working on it), but with my 1 ml graduated cylinders (had to estimate volume displacement between the ml lines) and some math, I found the SG to be about 3.22 - close to the 3.35.

Thanks!
Mitch


If you have any question in testing jewelry, you can contact us, i have been a proffessional jewelry tester for 5 years.


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 Post subject: Re: Hanneman Tanzanite Filter unexpected results
PostPosted: Fri Jul 15, 2022 6:04 pm 
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And, if you have any questions about testing jewelry, ruheking43, you can always ask us. :wink:


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