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 Post subject: Unknown (russian?) rock
PostPosted: Sun Dec 23, 2012 6:15 am 
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Attachment:
sverdlovsk.jpg
sverdlovsk.jpg [ 29.42 KiB | Viewed 1249 times ]

Attached a picture of a customers rock (asked for the name of it), and it is supposed to come from russia (Sverdlovsk). Anyone familiar with this one? Someone suggest it was a conglomerate but it do not look like that at all (no roundish pebbles in matrix). Anyone?


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 Post subject: Re: Unknown (russian?) rock
PostPosted: Sun Dec 23, 2012 7:34 am 
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Please show the other side, to.

My grist thought was a mafic rock. I.e. peridotite.
Do you see any signs of olivine, pyroxene, plagioclase or..?

Can you take SG?

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 Post subject: Re: Unknown (russian?) rock
PostPosted: Sun Dec 23, 2012 9:02 am 
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No SG available at the moment.
Here is some more pictures. Now with a label in russian or bulgarian or whatever it is.

Attachment:
sverdlovsk2.jpg
sverdlovsk2.jpg [ 25.76 KiB | Viewed 1240 times ]

Attachment:
sverdlovsk1.jpg
sverdlovsk1.jpg [ 35.05 KiB | Viewed 1240 times ]


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 Post subject: Re: Unknown (russian?) rock
PostPosted: Sun Dec 23, 2012 4:00 pm 
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The lable says:
"Russkie samotsvety" factory in Sverdlovsk (now Yekaterinburg)
Lizard on the stone (probably you have the stone but the lizard didn't survive :( )
JASPER
TU- ... -69 - is the code of technical specifications of the rock (or of the object of art?) dated 1969, the object itself could be done much later)
PRICE 2 rubles 70 kopecks

The rock can be one of the multiple types of jasper from the Urals, but also could come from other parts of USSR.

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 Post subject: Re: Unknown (russian?) rock
PostPosted: Sun Dec 23, 2012 7:11 pm 
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many thx Egor


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 Post subject: Re: Unknown (russian?) rock
PostPosted: Sun Dec 23, 2012 10:01 pm 
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It's always difficult to reach a conclusion from a photograph but I'll have a stab at it. It looks like flaser structures. The original sedimentary rock has been sheered and metamorphosed with mineralisation along the sheer planes. You can see broken banded structures and sheering. This is most evident in the larger clast at the botton of the picture where there are three sheer planes.

Brian


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 Post subject: Re: Unknown (russian?) rock
PostPosted: Mon Dec 24, 2012 6:58 am 
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I think Egor nailed it. =D>

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