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Sonja

Wondering what is this blue

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Curious if anyone has a clue where the blue comes from in this rock? Is it a mineral by itself? I'm not finding any info from MGS, no response from the Geological Society of MN

Found in north central Minnesota. 

I appreciate any ideas and people's time on this.

Thanks

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The most common blue or bluish/grey minerals include azurite chrysocolla linarite vivianite, also turquiose. Dont know if found in your area?

Sorry I couldn't give you a positive id

J.

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Its a piece of sandstone (rock type) that is naturally stained with most likely a magnesium or manganese mineral.  Sandstone is a very  common, sedimentary rock, in parts of MN.

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