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28 Mar-09:37:50 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-19:47:08 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Pete Richards)
27 Mar-16:15:44 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-15:18:59 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Alfredo)
27 Mar-14:39:29 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
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27 Mar-02:39:50 Re: the mim museum in beirut, lebanon (Tobi)
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26 Mar-00:53:41 Re: collection of volkmar stingl (Volkmar Stingl)
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25 Mar-00:25:58 The mizunaka collection - quartz (Am Mizunaka)
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22 Mar-08:32:28 Re: collection of michael shaw (Michael Shaw)
22 Mar-04:20:41 Re: the mim museum in beirut, lebanon (Mim Museum)
21 Mar-22:49:19 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:47:40 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:45:25 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-15:34:23 Re: the mizunaka collection - quartz (Am Mizunaka)
21 Mar-14:35:08 Re: jim’s mineral collection (Jim Wilkinson)
21 Mar-14:15:36 The 4th phoenix heritage mineral show (phms) hosted by mineralogical society of arizona (m (Chris Whitney-smith)
21 Mar-04:36:10 Re: the mizunaka collection (Tobi)
21 Mar-04:11:47 Re: jim’s mineral collection (James Catmur)
20 Mar-23:34:15 The mizunaka collection - quartz (Am Mizunaka)
20 Mar-18:13:16 Re: jim’s mineral collection (Jim Wilkinson)

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Found in Iowa please identify
  
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Leone1986




Joined: 01 Aug 2020
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Location: Iowa

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PostPosted: Aug 04, 2020 12:13    Post subject: Found in Iowa please identify  

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


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James Catmur
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PostPosted: 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
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Firmo Espinar




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PostPosted: Aug 04, 2020 15:56    Post subject: Re: Found in Iowa please identify  

Hi Leone.

Welcome to FMF.

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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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