Formula: PbCu(VO4)(OH)

Colour: Grass-green, olive-green, yellow-green, siskin-green, blackish brown, nearly black

Lustre: Greasy

Hardness: 3 – 3½

Specific Gravity: 5.9

Crystal System: Orthorhombic

Member of: Adelite-Descloizite Group, Descloizite-Mottramite Series. Duftite-Mottramite Series.

Name: For the locality at Mottram St. Andrew, Cheshire, England where ore was stockpiled. Most likely mined from Pim Hill Mine, Shrewsbury, Shropshire.

Type Locality: Mottram St Andrew, Cheshire – England, UK

The copper analogue of Descloizite. A secondary mineral frequently found principally in the oxidized zones of ore deposits.