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Penn Dixie Pyrite


DevonianDigger

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So I have a few pieces of pyritized concretion that I found at Penn Dixie last week. One of them has a really odd shape though and weighs substantially more than other pieces it's size and seems to be almost entirely pyrite. Thoughts as to why this might be?

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You can see a penny-sized piece of Fenestella to the right of my thumb in this pic and the one below.

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Jay A. Wollin

Lead Fossil Educator - Penn Dixie Fossil Park and Nature Reserve

Hamburg, New York, USA

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It could be less altered by weathering than the other pieces that You are comparing it to.

I still think the blue color is a product of copper in the mineral.

Tony

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

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It's also amazing how much light does to these guys. When I found them I just saw a little pyrite and it was the weight that made me take them home. After I cleaned them up and put them under some bright light they turned yellow and blue like that. Without the heavy light they are just dark red and brassy.

Definitely sounds like Chalcopyrite to Me. It is also called "peacock ore" by some.

Chalcopyrite is the same as iron pyrite but with copper in the mix.

Tony

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

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