CIBJO releases Gemmological Special Report: considers process of separating measurable facts from opinion; See Gemological Articles below.
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 Post subject: Re: Blue topaz and tanning salons
PostPosted: Fri Jun 08, 2018 6:57 pm 
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Stephen Challener wrote:
So, as a topaz fan this topic has sat in the back of my mind for quite a while. Finally thanks to Nathan Renfro's research I think we have an explanation: https://www.gia.edu/gems-gemology/fall- ... -radiation
Her 'topaz' was lilely a misidentified blue zircon.
Nathan has a video of this effect in action up on his Instagram which is how I heard about it: https://www.instagram.com/p/BjfkniFFp4S ... uuxjiloyyv

Thanks for the follow-up Stephen.
Really interesting. I wasn't expecting that.


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