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 Post subject: Identification of Blue spinel with colored filters/UV
PostPosted: Wed Sep 19, 2012 4:58 pm 
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Dear friends. I hope that you are well and in good mood. Today I want to share with all of you the presentation of the identification of blue spinel colored by cobalt with the help of colored filters and using UV lamp.


please click on the below link now it required no sing in or password


http://aggemologist.blogspot.com/


I hope that you will enjoy it.

with best regards

Hamid Usman Khattak (HUK)

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HUK


Last edited by Osman khattak on Thu Sep 20, 2012 2:22 am, edited 2 times in total.

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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Wed Sep 19, 2012 5:25 pm 
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Thank you.

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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Wed Sep 19, 2012 6:26 pm 
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Okay, I joined Facebook even though I said I wouldn't ... I'm not joining anything else that I need a username and password :evil: .

Sorry, Hamid ... I would have really liked to see this :( .

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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Wed Sep 19, 2012 6:35 pm 
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I do not understand Barbara O. Ellis, GG. are you feel difficulty to open the presentation? or what happens?

please PM me your email I will send the copy of presentation to you.

with best regards

HUK

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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Wed Sep 19, 2012 11:34 pm 
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Hi Osman
When I follow the link in your first post it says the file no longer exists.

I will send you a pm with my email as I would really like to see this.

Thanks
Harold


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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Wed Sep 19, 2012 11:40 pm 
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Okay, before the link asked for a username and password; now it doesn't :? .

I am curious, Hamid -- Why were there no tests on natural blue spinel NOT colored by cobalt? The two shown side-by-side would be helpful :D . In fact, how was it determined ahead of time that the spinel crystals in matrix were colored by cobalt??

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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Wed Sep 19, 2012 11:52 pm 
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Yes....it's difficult to sign up to view the Power Point.
Send it to me too and I'll see if I can upload it to a place where everyone can view it.
:D


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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Thu Sep 20, 2012 2:29 am 
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Dear friends, very sorry to face a panic conditions :( :( :( . Now I convert the document from ppt to jpg format, Please click on the below link [-o< [-o< .

Now I hope that you will enjoy it.

http://aggemologist.blogspot.com/

with best regards


yours truly friend

Hamid Usman Khattak

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HUK


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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Thu Sep 20, 2012 8:16 am 
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I did enjoy it! Thanks for supplying so many photographs.


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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Sun Sep 23, 2012 8:51 pm 
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Attached is the Power Point Presentation on Spinel for view (pdf) or download.
Click here to download the file
[pdfview]http://www.gemologyonline.com/Separation%20of%20Blue%20Spinel%20Colored%20by%20Cobalt%20with.pdf[/pdfview]


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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Mon Sep 24, 2012 2:13 am 
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Thanks Teacher. Now it looks a presentation.

with best regards

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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Mon Sep 24, 2012 10:03 am 
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Hamid -- Could you please answer the questions I posted above? I'm truly curious about this. :|

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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Tue Sep 25, 2012 2:28 pm 
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Dear Barbara O. Ellis, GG, I will soon adding in the presentation the Natural spinel which colored is not due to cobalt.

with best regards

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HUK


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 Post subject: Re: Identification of Blue spinel with colored filters/UV
PostPosted: Tue Sep 25, 2012 7:37 pm 
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can't wait. thanks Hamid!


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