Scientific Name: Zinc bloom
Group: Carbonates
Chemical composition: Zn5(Co3)2(OH)6
Colors: Usually white or light grey; may be yellow, pink or brown
Hardness: 2 to 2.5
Formation: Usually forms in massive otryoidal habits
Principal Sources: Worldwide
Special Notes: Hydrozincite occurs as an oxidation product of zinc ores and as post mine incrustations. It occurs associated with smithsonite, hemimorphite, willemite, cerussite, aurichalcite, calcite and limonite. It can fluoresce blue under UV light.