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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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 Posted: Jul 07, 2013 14:28 Post subject: Re: A mineralogical trip through Iran |
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Vachik,
As always, beautiful specimens.
If I understand correctly, the green Andradite garnets are not from Kerman? Nice to see them on matrix.
Bob |
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vhairap
Joined: 11 Jun 2012
Posts: 37
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| Posted: Jul 07, 2013 14:47 Post subject: Re: A mineralogical trip through Iran |
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| GneissWare wrote: | Vachik,
As always, beautiful specimens.
If I understand correctly, the green Andradite garnets are not from Kerman? Nice to see them on matrix.
Bob |
Thanks Bob. Yes, these Andradite specimens are not from Kerman. This new locality in NE Takab, NW Iran can be conisdered as the second major locality for andradite (var. demantoid) after Soghan in Kerman. A detailed mineralogical investigation is needed to say more on differences with those from Kerman. I have obtained them from a local dealer.
Vachik
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Vachik Hairapetian |
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Riccardo Modanesi
Joined: 07 Nov 2011
Posts: 631
Location: Milano
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| Posted: Jul 08, 2013 04:00 Post subject: Re: A mineralogical trip through Iran |
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Hi to everybody! I saw these green garnets, they are very nice! But I have a question: provided the green colour is not emphatised by the machine and therefore the pictures really represent the true green colour of the crystals, how can you establish the garnets are andradite and not uvarovite? According to the colour, it`s much more similar to the uvarovite one, than to the andradite one. Just you should check the spectrum on the optical window (from violet to red). Iron lines on green and blue should be sightable if it is andradite.
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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vhairap
Joined: 11 Jun 2012
Posts: 37
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| Posted: Jul 08, 2013 05:44 Post subject: Re: A mineralogical trip through Iran |
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| Riccardo Modanesi wrote: | Hi to everybody! I saw these green garnets, they are very nice! But I have a question: provided the green colour is not emphatised by the machine and therefore the pictures really represent the true green colour of the crystals, how can you establish the garnets are andradite and not uvarovite? According to the colour, it`s much more similar to the uvarovite one, than to the andradite one. Just you should check the spectrum on the optical window (from violet to red). Iron lines on green and blue should be sightable if it is andradite.
Greetings from Italy by Riccardo. |
Hi Riccardo,
These garnets are in true colour.
I checked with a colleague in Geological Survey in Tehran. There is an unpublished mineralogical/gemological report on this occurrence in which it was attributed to Andradite. However, we certainly need to obtain further specimens for a thorough analysis as was done for very similar specimens from Soghan Kerman. One can reminds me whether Kerman specimens were uvarovite or not? I supposed not!
Vachik
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Vachik Hairapetian |
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Nico78
Joined: 31 Oct 2012
Posts: 34
Location: Paris
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| Posted: Jul 20, 2013 07:37 Post subject: Re: A mineralogical trip through Iran |
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Really interesting subject about a mineralogical country not well represented in the shows!
And really nice specimens of epidote!
Thx a lot for sharing this with us!
And what about the awesome red wulfenites?
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Young french geologist engineer somewhere around the world .
Also forgive me for my english syntax! I'm not yet fluent! |
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vhairap
Joined: 11 Jun 2012
Posts: 37
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| Posted: Jul 20, 2013 09:03 Post subject: Re: A mineralogical trip through Iran |
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| Nico78 wrote: | Really interesting subject about a mineralogical country not well represented in the shows!
And really nice specimens of epidote!
Thx a lot for sharing this with us!
And what about the awesome red wulfenites? |
Thanks Nico! Soon we (Tim Welting and me) will have a note with fresh photographs of Iranian wulfenites from several localities including awesome "red wulfenites". At the moment we are working on photographs and related text.
Cheers,
Vachik
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Vachik Hairapetian |
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