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Agates from Iran
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Reyhane




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PostPosted: Dec 13, 2014 07:45    Post subject: Re: Agates from Iran  

Agate


20141031_034.jpg
 Mineral: Agate
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11727 Time(s)

20141031_034.jpg



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Jordi Fabre
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PostPosted: Dec 13, 2014 07:45    Post subject: Re: Agates from Iran  

Please not one post for each photo. You can add multiple photos in each post. Please read A general guide for using the Forum with some rules and tips point 8:

8.-) You can include up to 15 photos or images within each message. To see how to add photos and how to include up to 15 photos/images in a single message follow this link
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Reyhane




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PostPosted: Dec 13, 2014 07:49    Post subject: Re: Agates from Iran  

Jordi Fabre wrote:
Please not one post for each photo. You can add multiple photos in each post. Please read A general guide for using the Forum with some rules and tips point 8:

8.-) You can include up to 15 photos or images within each message. To see how to add photos and how to include up to 15 photos/images in a single message follow this link

Thank you so much :)

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Reyhane




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PostPosted: Dec 13, 2014 08:12    Post subject: Re: Agates from Iran  

Thank you again Dear Jordi


20141031_036.jpg
 Mineral: Agate
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11684 Time(s)

20141031_036.jpg



20141031_037.jpg
 Mineral: Agate
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11685 Time(s)

20141031_037.jpg



20141031_038.jpg
 Mineral: Agate
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11729 Time(s)

20141031_038.jpg



20141031_040.jpg
 Mineral: Agate
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11685 Time(s)

20141031_040.jpg



20141031_039.jpg
 Mineral: Agate
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11687 Time(s)

20141031_039.jpg



20141031_042.jpg
 Mineral: Agate
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11723 Time(s)

20141031_042.jpg



20141031_046.jpg
 Mineral: Agate
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11674 Time(s)

20141031_046.jpg



20141031_047.jpg
 Mineral: Amethyst
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11675 Time(s)

20141031_047.jpg



20141031_048.jpg
 Mineral: Amethyst
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
 Viewed:  11687 Time(s)

20141031_048.jpg



20141031_024.jpg
 Mineral: host rock
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
host rock and my dear husband as a scale:)
 Viewed:  11663 Time(s)

20141031_024.jpg



20141031_035.jpg
 Mineral: host rock
 Locality:
Abandoned Agate Mine, Qom, Central, Iran
 Dimensions: cm
 Description:
host rock from the side and our friend as a scale:)
 Viewed:  11731 Time(s)

20141031_035.jpg



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Mark Ost




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PostPosted: Dec 13, 2014 14:02    Post subject: Re: Agates from Iran  

Nice shots!
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Mike Wood




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PostPosted: Dec 13, 2014 15:29    Post subject: Re: Agates from Iran  

Interesting photo's Reyhane.
In regard to your earlier question, I think you can call this type of rock "porphyryritic andesite lava"; the large white phenocrysts would be a type of feldspar. It is certainly amygdaloidal in part, with the otherwise empty vesicles (gas bubbles) now occupied by silica (agate or chalcedony). When the vesicles are filled with another mineral, they are called amygdaloids. The rocks appear to be mostly very 'weathered', in that they have been subject to physical and chemical decomposition.
I wonder how long since this lava was formed, I mean originally, when it was new?

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alfredo
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PostPosted: Dec 13, 2014 20:31    Post subject: Re: Agates from Iran  

Reyhane, Thanks for the interesting photos. When you say "abandoned agate mine", do you mean it used to be operated commercially? If so, what was the agate used for?

If you are doing this for a thesis, you should probably make a thin section of the rock matrix, which would give a lot of information.
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Reyhane




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PostPosted: Dec 14, 2014 09:22    Post subject: Re: Agates from Iran  

Mark Ost wrote:
Nice shots!


Thank you Dear Mark :)

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Reyhane




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PostPosted: Dec 14, 2014 09:45    Post subject: Re: Agates from Iran  

Mike Wood wrote:
Interesting photo's Reyhane.
In regard to your earlier question, I think you can call this type of rock "porphyryritic andesite lava"; the large white phenocrysts would be a type of feldspar. It is certainly amygdaloidal in part, with the otherwise empty vesicles (gas bubbles) now occupied by silica (agate or chalcedony). When the vesicles are filled with another mineral, they are called amygdaloids. The rocks appear to be mostly very 'weathered', in that they have been subject to physical and chemical decomposition.
I wonder how long since this lava was formed, I mean originally, when it was new?


Thank you for your opinion Dear Mike :)
Yes! You are right...actually the groundmass is made of glass with microlites! my supervisor believes that they are basaltic andesite ...your idea is like his
and about phenocrysts ...you are right again:) they are plagioclase ( my lovely plagioclase :D)

And about age...I'm not sure about the Date! it needs more study...But they are not too old! Eocene and later probably! but location is near to a desert and certainly physical weathering is very strong!

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Reyhane




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PostPosted: Dec 14, 2014 10:29    Post subject: Re: Agates from Iran  

alfredo wrote:
Reyhane, Thanks for the interesting photos. When you say "abandoned agate mine", do you mean it used to be operated commercially? If so, what was the agate used for?

If you are doing this for a thesis, you should probably make a thin section of the rock matrix, which would give a lot of information.


Your welcome :)
It has been operated commercially! But now it's just what you see! Probably there is something below...I have found Amethysts by digging (with hammer only)! They explore over the area not below!

Agate is holy in Islam and used for Rosary and jewellery...Especially red, brown and yellow...If you search Agate jewelry or Agate jewels images you will see lots of pictures
And if you want to see Persian form of jewels, search this word : "عقیق" that means Agate (spell is : aghigh) and it is mostly Cabochon cut here .

Yes I made 13 thin section myself and 30 out!
Sorry for any grammar mistake :)

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