A very curious and interesting specimen formed by cubic Pyrite crystals that have grown over an elliptical concave cavity, likely of fossil origin, formed by a petrified marly clay intergrown with bands of Pyrite.
A high-quality piece and difficult to find nowadays, as the quarry from which it comes, although still active, is dangerous and specimen collection there is prohibited.
Saint-Denis-d'Orques, La Flèche area, Sarthe Department, Pays de la Loire France (2022)
Specimen size: 14.1 × 10.9 × 4.1 cm = 5.55” × 4.29” × 1.61”
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