AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from South Dakota > Calcite var. Septarian Nodule

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Calcite var. Septarian Nodule from South Dakota

 
Calcite var. Septarian Nodule from South Dakota

Calcite var. Septarian Nodule from South Dakota

Photo below under shortwave ultraviolet illumination:
Calcite var. Septarian Nodule from South Dakota

DESCRIPTION:No. 34310
Mineral:Calcite var. Septarian Nodule
Locality:South Dakota
Description:Half of a hollow geode lined with yellow calcite crystals that fluoresce under UV illumination. This formation is known as a Septarian Nodule. The irregular shape was caused by shrinkage fractures that were crystallized with the calcite.
Overall Size:16x16x8 cm
Crystals:3-5 mm
Archived: For reference only

 

 

 

 

 

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