Multiple choice general knowledge science & technology chalcanthite is an ore of __ and is __ in colour. fill in the blanks. calcium,white lead,red copper,bright blue none of these Reveal answer Fill a bubble to check yourself C Correct answer Explanation Chalcanthite is a hydrated copper sulfate mineral (CuSO4·5H2O). Its name comes from Greek 'chalkos' (copper) and 'anthos' (flower). It forms bright blue crystals and is an important ore of copper. The color is distinctive due to the copper ions.