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Bloomington Nodule
  
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MadeeMac




Joined: 18 Apr 2021
Posts: 3
Location: Indiana

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PostPosted: Apr 19, 2021 07:10    Post subject: Bloomington Nodule  

I cracked open a few Geodes(and nodules) collected near Bloomington Indiana. Any ideas on what this one might be? It is metallic and fibrous.


F4057618-BCF5-4BFF-9524-47CA50C77FD7.jpeg
 Mineral: Unknown nodule
 Locality:
Monroe County, Indiana, USA
 Dimensions: 8x7cm
 Description:
Chalcopyrite perhaps?
 Viewed:  693 Time(s)

F4057618-BCF5-4BFF-9524-47CA50C77FD7.jpeg



699F715B-8FB4-4F4B-8163-13E881A1DD65.jpeg
 Description:
 Viewed:  686 Time(s)

699F715B-8FB4-4F4B-8163-13E881A1DD65.jpeg


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B.




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PostPosted: Apr 19, 2021 07:34    Post subject: Re: Bloomington Nodule  

A typical solid Indiana geode, long ago weathered out of the surrounding limestone host rock.
The white is druzy quartz, the center cavity is not metallic, but weathering/corroding calcite.
To check, put some vinegar or, better yet, muriatic acid on it. With the acid it should fizz.

On this website go to "A mineralogical trip thru the states of the USA" Go to "Indiana" There you will see many examples of geode finds from Monroe County. BOB
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MadeeMac




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PostPosted: Apr 19, 2021 08:04    Post subject: Re: Bloomington Nodule  

Thank you for the information!!!’
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