New Mineral Named After GIA’s John Koivula
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 Post subject: Requesting your opinion
PostPosted: Mon Mar 04, 2019 11:16 pm 
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Could anyone provide us some opinion on what gemstone this might be so we could narrow down our test? We couldn't appear to any commercial gem testing location yet for security reasons because if this item is found to be authentic, we need to ensure our security while moving this around.
We suspect the green one could be garnet, alexandrite, or even emerald. While the black items are known to be jade.


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 Post subject: Re: Requesting your opinion
PostPosted: Tue Mar 05, 2019 12:54 pm 
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Wowwwww :smt005
I want this beautiful genuine emerald or garnet or alexandrite or whatever for my next birthday !
If I am unable to lift it as a ring, I will block some papers or doors with it.
Yes you had better not go to any gem testing location, not for security but for seriousness reasons.


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 Post subject: Re: Requesting your opinion
PostPosted: Tue Mar 05, 2019 1:28 pm 
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That size, cut and color, it is glass. Another indication is the severely rounded facet.

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 Post subject: Re: Requesting your opinion
PostPosted: Tue Mar 05, 2019 1:32 pm 
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Kidding aside (cough cough, Isi), what can you do to help identify this green unknown.
Do you have any loupes or magnifiers to look more closely at the stone?

I agree with Stephen glass is the most likely option.
Let's do some easy tests.

Check the rounded facet edges for fractures. I suspect you might find some small conchoidal fractures.
It will look like tiny shiny concave features.
ImageImage

Look inside the unknown. Anything look like bubbles? Check thoroughly.
Image

Do you have anything lying around which you know is a genuine crystal...maybe a piece of quartz or a large agate.
Touch your upper lip with it. It's cold right?
Touch the green stone to your upper lip? What is the temperature by comparison.

Report back.


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 Post subject: Re: Requesting your opinion
PostPosted: Wed Mar 06, 2019 12:54 am 
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First stance, melt green bottle glass.


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 Post subject: Re: Requesting your opinion
PostPosted: Wed Mar 06, 2019 12:21 pm 
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So, Rhey1971, have you conducted any tests?
Please report back.


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 Post subject: Re: Requesting your opinion
PostPosted: Thu Mar 07, 2019 1:56 am 
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No he is posting everywhere to get an identification ;)
Saw it now in 3 different places and everybody is telling him the same...

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 Post subject: Re: Requesting your opinion
PostPosted: Thu Mar 07, 2019 9:36 am 
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My opinion is, he knows perfectly well what he has, but he is trying his luck, in case he could fish some credulous buyer.


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 Post subject: Re: Requesting your opinion
PostPosted: Thu Mar 07, 2019 12:50 pm 
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Is there any chance that we discuss REAL gems and interesting topics and not this kind of s**t...

It is boring.. :roll:

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 Post subject: Re: Requesting your opinion
PostPosted: Thu Mar 07, 2019 1:46 pm 
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Marlow, your wish is my command.
I am going to open a new thread called Glass, Slag and related Wannabes.
We will add all the threads that belong there.


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 Post subject: Re: Requesting your opinion
PostPosted: Thu Mar 07, 2019 2:02 pm 
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Barbara,
That is a good idea so only those interested in these kinds of threads will look there. The rest can simply ignore the whole thread.

I will say that since these glass/slag/fakes have been a part of the industry for thousands of years, they can be interesting. I had the chance to examine some of the ancient crowns in an African country a couple of years ago. A great many of the "stones" in these crowns are glass, or other fakes.

Also new versions of fakes being created and sold all of the time. I get sent images and videos of "stones" from the bush regularly. In the last couple of months I have been offered very fine Benitoite from a new discovery in Africa, and the largest, finest Sapphire XTL I have ever seen. All fakes of course, but people are trading these kinds of things daily. Maybe I will post some of the interesting fakes I get sent pictures of in the new thread.


Last edited by 1bwana1 on Thu Mar 07, 2019 8:19 pm, edited 2 times in total.

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 Post subject: Re: Requesting your opinion
PostPosted: Thu Mar 07, 2019 2:39 pm 
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Correct 1bwana1.

Glass imitations were found next to real gems in jewelry found in the pyramids at Giza.
I don't find it boring.


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 Post subject: Re: Requesting your opinion
PostPosted: Fri Mar 08, 2019 2:01 am 
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Sounds like a good idea =D>

Me an one of my sons are collecting glass from a nearby lake. Its fun for him and interesting for me as some of these glasses are hundred and more years old. So glass is not always boring.
And for test-cutting or trying always welcome :mrgreen:

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 Post subject: Re: Requesting your opinion
PostPosted: Sun Mar 10, 2019 6:09 am 
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Barbra - great idea!!

Historical glass or natural glass like the ones you find in Eifel district in Germany in fantastic colors are def. worth to collect and to discuss.

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 Post subject: Re: Requesting your opinion
PostPosted: Fri Mar 15, 2019 2:46 am 
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Barbra Voltaire wrote:
Kidding aside (cough cough, Isi), what can you do to help identify this green unknown.
Do you have any loupes or magnifiers to look more closely at the stone?

I agree with Stephen glass is the most likely option.
Let's do some easy tests.

Check the rounded facet edges for fractures. I suspect you might find some small conchoidal fractures.
It will look like tiny shiny concave features.
ImageImage

Look inside the unknown. Anything look like bubbles? Check thoroughly.
Image

Do you have anything lying around which you know is a genuine crystal...maybe a piece of quartz or a large agate.
Touch your upper lip with it. It's cold right?
Touch the green stone to your upper lip? What is the temperature by comparison.

Report back.


Hi Barbara Voltaire. Thanks for the tips. We'll try these methods and let you all know.


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