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SEP310 Septarian Free Form

SEP310 Septarian Free Form


This is a very nice Free Form from a Septarian Nodule from Madagascar.  This awesome specimen has lots of Brown on the outside with a contrasting dark Yellow to to dark Grey Calcite crystals inside the beautiful center cavity.  The cut face has a high polish with the inside left natural.  It measures 2 3/8″ wide x 2″ x  3 7/8″ tall.  Very cool.

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Septarian, also know as a type of Concretion, is a volume of sedimentary rock in which a mineral cement fills the porosity.  Concretions are often ovoid or spherical in shape.  They form within layers of sedimentary strata that has already been deposited.  It is composed of a Carbonate mineral such as Calcite, a Silica such as Chert, Flint or Jasper or an Iron Oxide such as Goethite or Hematite.  It is commonly found in Shale, Siltstones and Sandstones.


Additional information

Weight1.00 lbs
Dimensions2.375 × 2 × 3.875 in

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