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 Post subject: Orange Opals and sugar!
PostPosted: Mon Mar 11, 2013 5:00 pm 
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Joined: Mon Nov 05, 2012 10:13 am
Posts: 18
Location: Europe
I never heard about this treatment explained in this article:

blog.thejewellerychannel.tv/sweet-orange-opal/

(I found that link shared on googleplus)

Do you know something about it and how to spot some treated opals, maybe sold for fire opals?
Thanks


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 Post subject: Re: Orange Opals and sugar!
PostPosted: Mon Mar 11, 2013 5:55 pm 
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Joined: Wed Jan 23, 2013 5:29 pm
Posts: 1047
Location: Paris
I have heard of such a treatment to obtain black opal (by carbonisation of the sugar).
Maybe this is a matter of gradation of the carbonisation ? You get orange before getting black ? Like caramel ?


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 Post subject: Re: Orange Opals and sugar!
PostPosted: Thu Mar 21, 2013 12:35 pm 
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Joined: Mon Jul 30, 2012 10:46 pm
Posts: 2
I have an orange opal which was said treated by Smoke & Sugar Acid. I heard this treatment should creating black color instead of orange. Please correct me if i'm wrong. To be honest I'm not quite sure about the lab result which make a statement that is a treated by smoke & sugar acid. Please check pictures below, please help me to confirm.

Image

Image

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