Septarian Calcite Nodule (Utah)

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SKU 240929

This polished slice of a Septarian calcite nodule is from Utah. 

Septarian nodules consist of a clay-rich nodule that developed a rigid outer shell while the interior dehydrated and shrank, leaving polygonal cracks. The interior of the nodule later filled with calcite crystals. These nodules occur in various locations around the world and their exact method of formation is still debated.

Large cabinet specimen: about 5.1" x 4.5" x 0.6" (130mm x 115mm x 15mm)