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Leone1986 · Joined: 01 Aug 2020 Posts: 1 Location: Iowa

Found the large tan and blue with crystals barely showing in a farm field and the iron like non magnetic one in clay and sand area by a river but up top of bluff area which is all sand and clay also in Iowa

James Catmur · Posted: Aug 04, 2020 15:37 Post subject: Re: Found in Iowa please identify

Might be (but you need to do tests to be certain [hardness and streak])

https://www.mineral-forum.com/message-board/viewtopic.php?p=19487#19487

Calcite in a septarian nodule for the first?

Goethite after pyrite for the second

Firmo Espinar · Posted: Aug 04, 2020 15:56 Post subject: Re: Found in Iowa please identify

Hi Leone.

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The last two pics seem to be some kind of microcrystalline quartz, chert or agate.

Iowa is very large. A more limited geographic position would also help.

Thank you.

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