Calcite (septarian nodule) - , Basque Country (Euskadi), Spain - 9 cm x 8 cm x 5 cm

Mineral: Calcite (septarian nodule)
Locality: Guipúzcoa / Gipuzkoa, Basque Country (Euskadi), Spain
Dimensions: 9 cm x 8 cm x 5 cm

Description: Polished half of a septarian nodule. Veins filled of white calcite with a thin pyrite skin forming a star pattern.