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SEP310 Septarian Free Form

SEP310 Septarian Free Form


This is an amazing Free Form from a Septarian Nodule from Utah. This awesome specimen has lots of brown Aragonite sharply contrasted by bright yellow Calcite. It has a great polish with a spectacular open crystal cavity. It measures 3 1/2″ wide x 2 1/2″ x 4 1/8″ tall.  Very cool.

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Septarian, also known 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

Weight2.00 lbs
Dimensions3.5 × 2.5 × 4.125 in

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