Septaria concretion exhibited inside the Crystal Museum of Espace Tairraz, Chamonix, Haute Savoie, France

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Septaria is a concretion of marly limestone or shale characterized by a network of fissures. These cracks can be radial and concentric, and are often filled by cementation of calcite and barite crystals.

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Size: 4272px × 2848px
Location: Chamonix-Mont-Blanc, Haute-Savoie, France
Photo credit: © Simona Abbondio / Alamy / Afripics
License: Licensed
Model Released: No

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