Beautiful Cut Septarian Nodule on stand from Boom, Periode Oligocene,

cut and polished to reveal internal calcite and aragonite structures,

Septarian nodules or clay spheres occur because calcite in liquid form has penetrated the cracks and crevices of the clay

found in the province of Antwerp, Boom region,

placed on a custom made metal base

55 cm high x 38 cm wide x 11 cm deep