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.