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Author Topic: Please help me identify this rock. Thanks!  (Read 4621 times)

Offline cbressler1976

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Please help me identify this rock. Thanks!
« on: 05/01/2011 18:25:07 »
Please help me identify this rock.  I have more pictures if you need them...Thank you!






 

Offline cbressler1976

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Please help me identify this rock. Thanks!
« Reply #1 on: 05/01/2011 18:27:08 »
 

Offline JimBob

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Please help me identify this rock. Thanks!
« Reply #2 on: 06/01/2011 04:44:28 »
Looks like quartz to me. The darker colored bands, particularly the very thinly banded layers indicate to me that the rock was formed by hot silica rich water near an epithermal water source.

An epithermal source is usually associated with magmatic activity. Wee will see what our hard rock guy says when he gets back into action. I like (and know much more about) sedimentary rocks.
 

Offline Bass

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Please help me identify this rock. Thanks!
« Reply #3 on: 07/01/2011 00:46:41 »
Doesn't look right for quartz.  3rd picture looks like it has remnant layering.

Maybe talc?  Can you scratch it easily?

Barite?  is it really heavy?

Anything else you can tell us about the specimen would help
 

Offline frethack

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Please help me identify this rock. Thanks!
« Reply #4 on: 07/01/2011 17:07:46 »
Looks like green quartzite to me.  The third picture may even show some relict bedding.
 

Offline cbressler1976

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Please help me identify this rock. Thanks!
« Reply #5 on: 08/01/2011 02:21:17 »
I don't know all of the rock terms....so don't laugh when I describe it....It's heavy....has green in it...and kind of big....it kind of reminds me of quartz, but the green and there isn't anything smooth on it....it's very rough....
 

Offline cbressler1976

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Please help me identify this rock. Thanks!
« Reply #6 on: 08/01/2011 02:23:38 »
I looked up green quartzite and it doesn't look like that to me....it's more sparkily to me...
 

Offline cbressler1976

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Please help me identify this rock. Thanks!
« Reply #7 on: 08/01/2011 02:27:23 »
.....oh, you can't scratch it.....it's hard....
 

Offline cbressler1976

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Please help me identify this rock. Thanks!
« Reply #8 on: 08/01/2011 02:30:03 »
ok....I found it...it's definately a Aventurine (Green Quartz).....you all are right!!  Thank you so much for your help!!
 

Offline JimBob

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Please help me identify this rock. Thanks!
« Reply #9 on: 08/01/2011 05:57:01 »
well thanks. but perhaps Bass needs to look back in his mineralogy book - the one he got in 1802, where talc is not listed in the "chain silicate" group pf mineral types.

We all get old. I used the archaic term so he would understand.
 

The Naked Scientists Forum

Please help me identify this rock. Thanks!
« Reply #9 on: 08/01/2011 05:57:01 »

 

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