Siderite, Goethite
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Siderite on goethite, 8.2cm, from the Huntington mine, Cuyuna Range. Minnesota DNR collection at the Moose Lake Agate and Geological Center; Jeff Krueger photo.
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Mineral guide
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warm-toned iron carbonate with sharp rhombohedra and occasional gemmy crystals; prized for luster, classic localities Harz, Panasqueira, Dal’negorsk.Regional guide

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