Calcite "Dogtooth" XXL from Sardinia, Italy

Old piece from the Ste Marie aux Mines museum,
 Huge "Dogtooth" Calcite from Sardinia, Italy.
 XXL coin crystallized on both sides, very old coin not found to date!
 Size: 53cm by 49.5cm by 18cm for 32kg
 an opportunity to seize !!!
 
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