Abstract/Description: FeSO4-7H2O and CaCO3 - Mohs Hardness: 2 - 3. Melanterite is a hydrated iron sulphate formed after the decomposition of pyrite or other iron minerals due to the action of surface waters. It is often found in mines as a post-mining formation on mine walls. Calcite is the one of the most common minerals on earth. It constitutes a major portion of many of the earth's rocks.
Subject(s): Shullsburg, WI, United States
environmental sciences