A cold extraction reaction of mercury (IMAGE) Università di Bologna Caption The result of a cold extraction reaction of mercury: by grinding cinnabar with copper powder in a mortar, is obtained the formation of mercury in the form of droplets. Credit University of Bologna Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.