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12 Dec-21:57:14 Re: fake colombian emeralds (Fiebre Verde)
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12 Dec-20:18:28 Re: new generation for picture - ploum (Bob Kerr)
12 Dec-19:37:20 Re: a mineralogical trip through the states of usa - pennsylvania (Am Mizunaka)
12 Dec-19:13:08 Re: a mineralogical trip through the states of usa - pennsylvania (Bob Carnein)
12 Dec-18:05:31 Re: a mineralogical trip through the states of usa - pennsylvania (Kushmeja)
12 Dec-14:57:43 Re: new generation for picture - ploum (Ploum)
12 Dec-14:54:45 Re: new generation for picture - ploum (Jose Luis Jara Jara)
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Random ores?
  
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James W




Joined: 23 Apr 2018
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PostPosted: Aug 04, 2019 12:34    Post subject: Random ores?  

Found some specimens in a central TX creek wondering if anyone can identify them. Reddish brown streak, possible ore deposits??


B1459F4B-64EB-4975-B69C-22CACD79FABF.jpeg
 Mineral: Metal Ore?
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Austin, Texas, USA
10mm
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James W




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PostPosted: Aug 04, 2019 12:52    Post subject: Re: Random ores?  

Also perhaps wrong forum
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Bob Harman




Joined: 06 Nov 2015
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PostPosted: Aug 04, 2019 13:23    Post subject: Re: Random ores?  

Perhaps iron oxide concretions containing hematite (the reddish brown streak). These are common in sedimentary matrix locations and are not considered "ore deposits". BOB
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Dale Hallmark




Joined: 16 Jun 2014
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PostPosted: Aug 04, 2019 17:09    Post subject: Re: Random ores?  

I'm from central Texas and I have picked up tons of them over the years. They are iron concretions. I have found them as relict pyrite cubes and amorphous masses. Possible minerals are siderite, limonite and hematite all usually weathered more or less into red and yellow ochre.

You can find some amazing shapes and very large masses.
Dale
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