August 13-15—East Coast Gem, Mineral and Fossil Show; Better Living Center, West Springfield, Massachusetts
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Wed Jul 28, 2021 7:02 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: Vintage synthetics?
PostPosted: Tue Jan 12, 2021 6:49 pm 
Offline
New to the Forum or The Quiet Type

Joined: Wed Sep 02, 2020 11:23 am
Posts: 5
Someone in my world is selling a shocking number of plastic bags with what looks to me like synthetic rough material. It is advertised (somewhat cryptical to me): "The quality is defined by the manufacturer and the fabrication date".
I did a little research and this seems to be genuine vintage synthetic material (vintage like 1930's or so).

Would you agree?

As you can see from pictures attached, the labels include markings that I read: blue, green, yellow, blue cobalt, blue trapiche, yellow kunzite, opal.
100 grams in each plastic bag (maybe), not very large pieces.

The asking price is moderate to very (VERY) low depending on if there is value in this material... your guess: is there any? (The pictures are not conclusive, I know and I can see).

Would you hypothetically try this kind of material for faceting?


Attachments:
Opal II.png
Opal II.png [ 484.94 KiB | Viewed 495 times ]
lot 2 large blau ko gelb.png
lot 2 large blau ko gelb.png [ 646.94 KiB | Viewed 495 times ]
lot 1 gelb kt yellow kunzite.png
lot 1 gelb kt yellow kunzite.png [ 597.17 KiB | Viewed 495 times ]
Grun 1958 S.png
Grun 1958 S.png [ 457.6 KiB | Viewed 495 times ]
Blau trp 1754 s blue trapiche.png
Blau trp 1754 s blue trapiche.png [ 507.35 KiB | Viewed 495 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: Vintage synthetics?
PostPosted: Thu Jan 14, 2021 7:35 pm 
Offline
Gemology Online Veteran
User avatar

Joined: Tue Apr 05, 2016 7:58 pm
Posts: 827
Location: San Marcos, CA
My opinion would be send some samples to a lab or gemologist for testing, then decide whether it is worth the time investment of cutting.

_________________
The Gem Garden
San Marcos, CA


Top
 Profile  
Reply with quote  
 Post subject: Re: Vintage synthetics?
PostPosted: Thu Jan 14, 2021 7:48 pm 
Offline
Gemology Online Veteran
User avatar

Joined: Tue Apr 05, 2016 7:58 pm
Posts: 827
Location: San Marcos, CA
With some searching I found some content relating to glass and chemical factories.

_________________
The Gem Garden
San Marcos, CA


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 1 guest


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