LOCALITY - ⚒ Lab Grown, Poland CHALCANTHITE, Chalkanthit, Calcantita, Calcantite, 胆礬, Халькантит, 胆矾 PLEASE READ AUCTION DESCRIPTION BEFORE YOU BUY !!! Unusual museum size beautiful blue Chalcanthite crystal on matrix. Terminated crystal, well formed, sharp color, cabinet size specimens. Very good quality in thiz size!! *Please not: Specimen reacts on contact with water and strong sun light, do not wash it, for cleaning using compressed air. The specimen is not intended for young children, wash their hands after each contact and do not put in your mouth. Chalcanthite's blue color is one of its most notable features, but it is insufficient in identification. Other useful tests include associated minerals, crystal habit, solubility and subsequent coloring of the water blue. Chalcanthite can also dye materials blue when dissolved in water, and has a peculiarly sweet and metallic taste, although consuming it can induce dangerous copper poisoning. > WE ACCEPT RETURNS.