Stock Photo - PRODUCTION - 11 September 2023, Saxony, Rochlitz: A sign ""Company premises, no trespassing!"" warns at the entrance to the Rochlitz Porphyry Manufactory quarry. Since 2022, the Saxon rock has been allowed to call itself a ""Heritage Stone"", chosen by the International Union of Geological Sciences. The porphyry tuff is the first German natural stone to receive this award. Inspired by the award for their stone, the Rochlitz people want to bring it even more attention. (to dpa ""Unique and awarded - Rochlitz porphyry in demand as building material"") Photo: Jan Woitas/dpa. - Rochlitz/Saxony/Germany

Stock Photo: PRODUCTION - 11 September 2023, Saxony, Rochlitz: A sign ""Company premises, no trespassing!"" warns at the entrance to the Rochlitz Porphyry Manufactory quarry.

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