- Brand: Casa de plata
- Product Code: CSR-1508
- Availability: By Order
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", and
refers to the cracks/separations in this kind of rock. There is an
incorrect explanation that it comes from the Latin word for "seven",
septem, referring to the number of cracks that commonly occur. 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 oriented cracks taper towards the margins of septarian
concretions is taken as evidence that in these cases the periphery was
stiffer while the inside was softer, presumably due to a gradient in the
amount of cement precipitated.
The process that created the septaria, which characterize septarian concretions, remains a mystery.
Description
Stone - Septarian
Stone Size - 20X20 MM
Stone Shape - Round
Stone Color - Multi
Stone Cutting - Cabochon
Weight - 15.33 Gms
SKU - CSR-1508