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Slag glass probably?
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Riccardo Modanesi




Joined: 07 Nov 2011
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PostPosted: Mar 18, 2019 10:19    Post subject: Re: Slag glass probably?  

Hi to everybody!
It could also be an opal! I have a fluorescent opal and the fluorescence color is the same as this specimen.
Greetings from Italy by Riccardo.

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Hi! I'm a collector of minerals since 1973 and a gemmologist. On Summer I always visit mines and quarries all over Europe looking for minerals! Ok, there is time to tell you much much more! Greetings from Italy by Riccardo.
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Laura Overstreet




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PostPosted: Mar 18, 2019 10:36    Post subject: Re: Slag glass probably?  

Hi Riccardo,

I am glad to know that opal does really fluoresce under UV light. I really like the plain or common opal. Bonus if it 'glows'! I'll know more on my piece when I can test with the Geiger counter. Laura
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R Saunders




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PostPosted: Mar 18, 2019 14:53    Post subject: Re: Slag glass probably?  

Please compare the photo in this link to your glass chunk. Some are denser. Only due to more exact color. I have same that fluoresces. Not sure about the radio active levels in the vintage glass. Fiesta red pottery was unsafe to use.

https://en.wikipedia.org/wiki/Heisey_Glass_Company
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Laura Overstreet




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PostPosted: Mar 18, 2019 17:07    Post subject: Re: Slag glass probably?  

Hello again!

I do think it could be this company. I am learning the history of these operations now.

The Fiesta was cited by name on the EPA site not to use. I don't know much about that type. Except, that it is very popular and has been for several years.

Laura
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R Saunders




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PostPosted: Mar 19, 2019 12:09    Post subject: Re: Slag glass probably?  

Fiesta Ware is a very popular brand of glazed pottery. The one color was "very bad" and removed from market. Product was re-introduced to market some years ago. I not further comment due to not being forum related.
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