Scientific Name: Lead cholorphosphate

Group: Phosphates

Chemical composition: Pb5(PO4)3Cl

Colors: Green, yellow, orange, brown.

Hardness: 3.5 to 4

Formation: Prismatic to acicular crystals; Globular to reniform

Principal Sources: Wales; Scotland; England; Mexico; USA

Special Notes: Pyromorphite sometimes occurrs in sufficient abundance to be mined as an ore of lead. It is very similar in composition and appearance to mimetite and vanadinite.