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 Post subject: Re: Amber question
PostPosted: Mon Dec 08, 2014 7:42 am 
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Joined: Sat Oct 25, 2014 3:17 am
Posts: 38
Hio,
It's late answer: about FTIR: it's helps to solve part of questions: amber, copal or plastic: generally there is two mine places to look Baltic shoulder (1200-1250 cm-1), for copal you will find additional peak in place of shoulder, also C=0 position is important: 1730-1740 cm-1. Spectra for plastic have more complex and sharper peaks, also it could be true for copal. Treated or pressed: much more based on general appearance of sample! I have tried ATR, DRIFT and PAS methods for sampling.
If you have more questions, please ask!
Peters


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 Post subject: Re: Amber question
PostPosted: Mon Dec 15, 2014 3:15 am 
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Joined: Fri Apr 17, 2009 3:53 pm
Posts: 2049
Location: Sweden
Another simple test to distinguish plastic from copal or amber (at least untreated) is to use the hot needle again. The fumes smells like pine sap if amber. It will not smell like that if plastic. Same if rubbed with very fine grinding paper. The dust smells strongly of pine sap when amber.

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Conny Forsberg


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 Post subject: Re: Amber question
PostPosted: Fri Mar 20, 2015 2:32 am 
I suggest, if you are verifying real amber from other faux products go to a good where the amber stone research or where it sale. -Removed by Admin-. . If you need any help so can contact this. they must be help you. :D


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 Post subject: Re: Amber question
PostPosted: Mon May 11, 2015 12:40 pm 
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Joined: Mon May 11, 2015 8:27 am
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This looked like old amber to me, Christen, if you still have them I am interested. Thanks


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 Post subject: Re: Amber question
PostPosted: Tue May 12, 2015 10:54 am 
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Joined: Sun Mar 08, 2009 2:16 pm
Posts: 331
Another possible source of information that might be helpful:

http://stonegrouplabs.com/wp/wp-content/uploads/2013/01/Copal-vs-Amber1.pdf
[pdfview]http://stonegrouplabs.com/wp/wp-content/uploads/2013/01/Copal-vs-Amber1.pdf[/pdfview]


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 Post subject: Re: Amber question
PostPosted: Mon Aug 03, 2015 10:27 am 
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Joined: Wed Oct 17, 2012 12:20 pm
Posts: 104
Location: Cape Town S.Africa
Hi Cre
The beads on the right look like stuff I bought in Timbuctoo
and Mopti in Mali,also about 1975.It was genuine amber, so
I think you will be pleasantly surprised when you test it.


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 Post subject: Re: Amber question
PostPosted: Sun Sep 06, 2015 11:55 am 
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Joined: Wed Oct 17, 2012 12:20 pm
Posts: 104
Location: Cape Town S.Africa
Good one,Upcyclist.Could have been a worse typo if intending
to type doing!!


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