“Crystals with 24 faces (Tetrahexahedron: group m3m {120}) These crystals included in limestone are released partially with ClH. They were never found in the cracks or the cavities of the rock. The largest crystal measures 8mm. This special crystal shape was met only in the years 1975à78, in a very limited zone of the quarry.Lucky find on the site in 1976. Photograph and collection: CLAUDE jm ”