Novembr 16-18—COLUMBIA, SOUTH CAROLINA: Annual show; The Columbia, SC Gem and Mineral Society; Fri. 10-6, Sat. 10-6, Sun. 12-5
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 Post subject: UV light testing
PostPosted: Sat Nov 03, 2018 3:10 am 
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Joined: Thu Mar 15, 2018 8:32 am
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Hi all
I am new in gemmology and I want to ask my question in here from those pro gemmologistnput there.

I have done research and study about using UV light to distinguish between gems quality and treatments but does that UV light works same on the rough stones? If no polished facet exist does the UV light pass the surface of the unpolished stone? Does that cobalt or glass field stone show up same as polished stone?

Anyone experienced it , many appreciate
Maz


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 Post subject: Re: UV light testing
PostPosted: Sat Nov 03, 2018 1:49 pm 
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http://www.ruby-sapphire.com/heat_seeke ... scence.htm


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 Post subject: Re: UV light testing
PostPosted: Sat Nov 03, 2018 6:10 pm 
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Interesting read


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