Marcasite - Cap Blanc Nez, Pas-de-Calais, France
Marcasite crystals presenting the sperkise twin on chalk...
Crystallized marcasite on limestone matrix, very shiny with numerous spearhead-shaped macles (sperkise).
4 x 3.2 x 2.5 cm
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Marcasite crystals presenting the sperkise twin on chalk...
Marcasite with numerous well-expressed spearhead twins...
Marcasite in crystallized nodule presenting numerous spearhead...