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Help identifying this conglomerate
  
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Joe Weisberg




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PostPosted: Apr 22, 2018 20:18    Post subject: Help identifying this conglomerate  

The specimen in photo was acquired from a gentleman who collected Scholar Stones and other stones with interesting shapes. Unfortunately he did not label the specimens. Many of the items came from China. This one caught my eye. I am hoping someone can help me identify it. Measures 12.5 x 11.0 x 7.0 cm. Green pebble range 0.3 - 0.9 cm


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Matt_Zukowski
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PostPosted: Apr 22, 2018 23:10    Post subject: Re: Help identifying this conglomerate  

My first impression is that this is fake - green pebbles embedded in some man made material. The green pebbles don't show any identifying characteristics so you probably won't get much help from us without doing some testing unless someone here is familiar with this material. If you want to do some testing, please visit http://www.mineral-forum.com/message-board/viewtopic.php?p=19487#19487. Good luck.
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Bob Harman




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PostPosted: Apr 23, 2018 03:55    Post subject: Re: Help identifying this conglomerate  

I agree with MATT.
On the outside chance that the example was real, I looked thru many examples of PUDDING STONE type conglomerate. There are colorful varieties, but nothing like that.

One give-a-way is that every (!) greenish pebble is perfectly intact right up to the specimen edge with no chips, dings, or breakage while the matrix is rough and not smooth. Also note that just about all the imbedded pebbles are into the matrix to about the same depth. None are deeply imbedded, just poking out and none are about to fall out of the matrix. And the matrix, in the photo, shows no evidence of a natural break from the adjacent matrix.
Polished greenish pebbles purposely imbedded into a chocolate pudding claylike like matrix for a nice color contrast and then allowed to harden......... manmade.
BOB
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alanbartlett




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PostPosted: Apr 23, 2018 06:25    Post subject: Re: Help identifying this conglomerate  

Would agree with all the above but add that, from your photo, even the matrix appears to have a sheen - unlike anything I've ever encountered!
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Joe Weisberg




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PostPosted: Apr 23, 2018 07:07    Post subject: Re: Help identifying this conglomerate  

Thank you for your responses. Being a fake had not crossed my mind, but after reading your comments I agree that it may be a fake. I am adding a couple more photos of different angles. Even our mineral club memebers were stumped! Although they offered possible names, none suggested it was a fake!


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Joe Weisberg




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PostPosted: Apr 23, 2018 07:08    Post subject: Re: Help identifying this conglomerate  

Another photo...


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James
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PostPosted: Apr 23, 2018 07:51    Post subject: Re: Help identifying this conglomerate  

Could have been acid etched at some point?
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Pete Modreski
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PostPosted: Apr 23, 2018 11:45    Post subject: Re: Help identifying this conglomerate  

Wow, quite a rock--never seen anything quite like this.

The very smooth shiny surface does look suspicious--perhaps either polished, or sprayed with acrylic.

But, my other thought; rather than conglomerate (or artificial), I think this could be an amygdaloidal lava--where minerals have filled in all the large vesicles in the lava. It's certainly possible to have greenish minerals among the amygdaloid fillings. In particular, the last of the photos shows one elongate, elliptical-shaped white (amygdaloid)--this looks exactly like some that I have seen (in natural amygdaloidal lavas), and the white one could be either quartz, or zeolite minerals.

But it still may have been coated or polished.
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joshtw




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PostPosted: Apr 24, 2018 08:18    Post subject: Re: Help identifying this conglomerate  

This type of stone is a type of natural stone from Gobi Desert and is called “Prosperity Stone.” Those embedded colorful stones are considered as agate. There are some pictures online. If you copy and past this term "富贵石", you should be able to see some varieties.

I have some of these stones and here are their photos. I guess the brown stone is jasper.

Pete Modreski wrote:
Wow, quite a rock--never seen anything quite like this.

The very smooth shiny surface does look suspicious--perhaps either polished, or sprayed with acrylic.

But, my other thought; rather than conglomerate (or artificial), I think this could be an amygdaloidal lava--where minerals have filled in all the large vesicles in the lava. It's certainly possible to have greenish minerals among the amygdaloid fillings. In particular, the last of the photos shows one elongate, elliptical-shaped white (amygdaloid)--this looks exactly like some that I have seen (in natural amygdaloidal lavas), and the white one could be either quartz, or zeolite minerals.

But it still may have been coated or polished.



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