Septarian Noduals
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Septarian nodules are concretions of carbonate rich rock. In appearence they are blobs of gray or black rock. When they are cut open they are filled with mulitcolored minerals in angular patterns. Beautiful when polished with each piece having unique patterns, Septarians are popular with decorators and collectors alike.
What is a Septarian Nodual?
Septarians are blobs of limestone concretions with cavities that were filled with carbonate rich minerals.