[ dǎnfán ] blue copoeras blue copperas chalcanthite blue jack blue stone blue virtriol blue vitriol bluestone bule stone burnt brass caeruleum vitriolum calcantite calchante chalcanthil chalcanthitum chalkanthite copper sulfate copper vitriol cyanose cyanosite kupferchalcanthit kupfervitriol vitriolum caeruleum