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Author Topic: Need Your Help! I don't know what these rocks are...  (Read 14257 times)

Offline JimBob

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Need Your Help! I don't know what these rocks are...
« Reply #25 on: 05/02/2008 02:21:37 »
Hand written note on p. 514, "Mineralogy" by Berry & Mason, 1959, to the right of Lepidolite (then chemical composition) Mn3 causes the violet color. Lord, did I really take mineralogy in the early 60's??????? It is amazing I still remember this for some odd reason.
 

Offline Bass

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Need Your Help! I don't know what these rocks are...
« Reply #26 on: 05/02/2008 02:37:04 »
I stand corrected- a testament to your long-term memory
 

Offline JimBob

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Need Your Help! I don't know what these rocks are...
« Reply #27 on: 05/02/2008 03:04:38 »
See how long term it really is - see remarks on land-sea ratio in Environment.
 

Offline redm

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Need Your Help! I don't know what these rocks are...
« Reply #28 on: 08/02/2008 01:08:10 »
Sorry, I didn't mean to abandon the thread. This cold got the better of me and then I had to go in and have some serious medical tests (not related to the cold)

I didn't have a penny, but I scratched the purple rock with a quarter and it looked like the copper on the edge of the quarter came off on the rock. So it must be fairly hard.

Here's a couple more pictures:


 

Offline JimBob

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Need Your Help! I don't know what these rocks are...
« Reply #29 on: 08/02/2008 04:03:52 »
Sorry you have been sick. I am all the time, brain damage, you know.

If it got the copper did it also scratch the "silver" scratched? Copper is really soft.

I do suspect all of the rock left of the black stuff was the original color of the whole brecciated piece. The black stuff deposited is also turning that rock from light tan to grey.
 

Offline Bass

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Need Your Help! I don't know what these rocks are...
« Reply #30 on: 18/02/2008 01:10:16 »
Much better photos.
Are all the colors the same hardness?  Is the black harder or softer than the gray, or the brown?
 

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Need Your Help! I don't know what these rocks are...
« Reply #30 on: 18/02/2008 01:10:16 »

 

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