Dec.20 to 22:SAN DIEGO, CALIFORNIA: Wholesale and retail show; Gem Faire Inc.; Scottish Rite Center; Fri. 12-6, Sat. 10-6, Sun. 10-5;
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Wed Dec 11, 2019 8:02 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: Orange Opals and sugar!
PostPosted: Mon Mar 11, 2013 5:00 pm 
Offline
Established Member

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


Top
 Profile  
Reply with quote  
 Post subject: Re: Orange Opals and sugar!
PostPosted: Mon Mar 11, 2013 5:55 pm 
Offline
Gold Member

Joined: Wed Jan 23, 2013 5:29 pm
Posts: 1027
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 ?


Top
 Profile  
Reply with quote  
 Post subject: Re: Orange Opals and sugar!
PostPosted: Thu Mar 21, 2013 12:35 pm 
Offline
New to the Forum or The Quiet Type

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

Thanks


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Gemology Style ported to phpBB3 by Christian Bullock