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.