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Veröffentlichungen aus dem Deutschen Bergbau-Museum Bochum / Das Imperium macht Blau
Azurite from Wallerfangen/Saar was a highly sought-after commodity, and this blue copper mineral was mined in Wallerfangen in the Roman period, the Middle Ages and modern times. In all periods, azurite from Wallerfangen was primarily used as a blue pigment, for example in wall paintings.