noun. hydrated blue crystalline form of copper sulfate.
1. Chalcanthite is a mineral that forms in the oxidation zones of copper deposits. 2. The crystal structure of chalcanthite contains five water molecules for every copper sulfate molecule.
1. "The color of chalcanthite is like a brilliant sapphire, and it is a rare mineral." Oprah Winfrey, O, The Oprah Magazine 2. "Chalcanthite is a copper sulfate mineral that forms in the oxidized zone of copper deposits." Bill Nye, Science Guy