05532 - Top Beautiful Cut and Polished 2.25 Inch Septarian Nodule from South Morocco Roselite Sister taxa: Pharostoma

Sister taxa: Pharostoma

History: Recovered in April 2014 near the borders of Mauritania

72) and plagioclase corresponds to labradorite (XAn= 0

A massive fine-grained white or lightly tinted variety of gypsum

Great collection of 15 nicely well preserved and prepared specimens

05532 - Top Beautiful Cut and Polished 2.25 Inch Septarian Nodule from South Morocco Roselite Sister taxa: PharostomaSeptarian concretions or septarian nodules, are concretions containing angular cavities or cracks, called "septaria". The word comes from the Latin word septum; "partition", and refers to the cracks separations in this kind of rock. Cracks are highly variable in shape and volume, as well as the degree of shrinkage they indicate. Although it has commonly been assumed that concretions grew incrementally from the inside outwards, the fact that radially