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Reyhane
Joined: 10 Oct 2013
Posts: 48
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 Posted: Dec 13, 2014 07:45 Post subject: Re: Agates from Iran |
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Agate
| Mineral: | Agate |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran |  |
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| Dimensions: | cm |
| Description: |
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| Viewed: |
11801 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4894
Location: Barcelona
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| Posted: Dec 13, 2014 07:45 Post subject: Re: Agates from Iran |
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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
Joined: 10 Oct 2013
Posts: 48
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| Posted: Dec 13, 2014 07:49 Post subject: Re: Agates from Iran |
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| 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
Joined: 10 Oct 2013
Posts: 48
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| Posted: Dec 13, 2014 08:12 Post subject: Re: Agates from Iran |
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Thank you again Dear Jordi
| Mineral: | Agate |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
| Description: |
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| Viewed: |
11757 Time(s) |
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| Mineral: | Agate |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
| Description: |
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| Viewed: |
11757 Time(s) |
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| Mineral: | Agate |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
| Description: |
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| Viewed: |
11803 Time(s) |
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| Mineral: | Agate |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
| Description: |
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| Viewed: |
11758 Time(s) |
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| Mineral: | Agate |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
| Description: |
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| Viewed: |
11761 Time(s) |
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| Mineral: | Agate |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
| Description: |
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| Viewed: |
11797 Time(s) |
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| Mineral: | Agate |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
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| Viewed: |
11747 Time(s) |
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| Mineral: | Amethyst |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
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| Viewed: |
11751 Time(s) |
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| Mineral: | Amethyst |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
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| Viewed: |
11760 Time(s) |
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| Mineral: | host rock |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
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| host rock and my dear husband as a scale:) |
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| Viewed: |
11734 Time(s) |
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| Mineral: | host rock |
| Locality: | | Abandoned Agate Mine, Qom, Central, Iran | |
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| Dimensions: | cm |
| Description: |
| host rock from the side and our friend as a scale:) |
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| Viewed: |
11805 Time(s) |
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Mark Ost
Joined: 18 Mar 2013
Posts: 516
Location: Virginia Beach
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| Posted: Dec 13, 2014 14:02 Post subject: Re: Agates from Iran |
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| Nice shots!
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Mike Wood
Joined: 16 Dec 2010
Posts: 456
Location: Northern England
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| Posted: Dec 13, 2014 15:29 Post subject: Re: Agates from Iran |
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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
Site Admin
Joined: 30 Jan 2008
Posts: 979
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| Posted: Dec 13, 2014 20:31 Post subject: Re: Agates from Iran |
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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
Joined: 10 Oct 2013
Posts: 48
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| Posted: Dec 14, 2014 09:22 Post subject: Re: Agates from Iran |
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| Mark Ost wrote: | | Nice shots! |
Thank you Dear Mark :)
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Reyhane
Joined: 10 Oct 2013
Posts: 48
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| Posted: Dec 14, 2014 09:45 Post subject: Re: Agates from Iran |
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| 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
Joined: 10 Oct 2013
Posts: 48
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| Posted: Dec 14, 2014 10:29 Post subject: Re: Agates from Iran |
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| 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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