8" Septarian Slab DS2235 atlantisite septarian nodules have also been

septarian nodules have also been studied for their geological significance

a South African mining engineer

Dimensions: 15x9x4 mm

and is appreciated for its subtle

with additional deposits in various countries

8" Septarian Slab DS2235 atlantisite septarian nodules have also been8" Septarian Slab Approx. Dimensions: 8x7. 75x0. 5 inches Approx. Weight: 816 grams Locality: Mexico Slab stand is included. Septarian, a distinctive sedimentary rock, forms through the combination of calcite, aragonite, and limestone with organic matter and minerals such as iron sulfide. It develops in concretions within sedimentary deposits, often found in regions with ancient seabeds, notably in Utah, USA, Madagascar, and Morocco. These concretions