[cbressler1976 (OP)]

Please help me identify this rock.  I have more pictures if you need them...Thank you!

[cbressler1976 (OP)]

[JimBob]

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.

[Bass]

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

[frethack]

Looks like green quartzite to me.  The third picture may even show some relict bedding.

[cbressler1976 (OP)]

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....

[cbressler1976 (OP)]

I looked up green quartzite and it doesn't look like that to me....it's more sparkily to me...

[cbressler1976 (OP)]

.....oh, you can't scratch it.....it's hard....

[cbressler1976 (OP)]

ok....I found it...it's definately a Aventurine (Green Quartz).....you all are right!!  Thank you so much for your help!!

[JimBob]

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.