Septarian nodule
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Septarian nodule

by Konstantinos Kourtidis, Demokritus University of Thrace, Xanthi, Greece

Septarian concretions or septarian nodules, are concretions containing angular cavities or cracks, which are called "septaria". The word comes from the Latin word septum, "partition". This was found in Bachhausen and is exhibited in the Museum Reich der Kristalle in Munich.