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Author Topic: Yet another what is this rock question.  (Read 2200 times)

Offline stantiques

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Yet another what is this rock question.
« on: 02/08/2010 03:46:41 »
Well my 5 year old found this and we broke it open and found this inside both pieces.  He is very curious about this.  Anyone know what it is?

newbielink:http://picpaste.com/DSC01964.JPG [nonactive]


 

Offline RD

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Yet another what is this rock question.
« Reply #1 on: 02/08/2010 06:47:52 »
Pictures up to 128Kb can be attached to posts in this forum Stantiques ..



http://picpaste.com/DSC01964.JPG
 

Offline RD

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Yet another what is this rock question.
« Reply #2 on: 03/08/2010 07:46:19 »
This is a guess
Quote
Purple ochre and Brown ochre also exist for variant hues. Because of these other hues, the color Ochre is sometimes referred to as Yellow ochre.
http://en.wikipedia.org/wiki/Purple_ochre
 

Offline JimBob

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Yet another what is this rock question.
« Reply #3 on: 06/08/2010 22:11:14 »
The rock is a sandstone. The coloring is the result of a water solution passing through the sandstone. I am unsure that the coloring is due to natural causes. It could also be that some industrial chemicals have caused this color.

Fluoride added to a city water supply can react with the calcium in the cement of the sandstone producing the chemical that in mineral form is called Fluorite. It is the one that has the beautiful purple square crystals.

So this could as easily be city water contamination as anything else.

 

The Naked Scientists Forum

Yet another what is this rock question.
« Reply #3 on: 06/08/2010 22:11:14 »

 

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