Crystal system: Tetragonal.(usually forms as sheaf-like aggregates of tabular crystals or as rosettes).
Hardness: 2.5
Density: 3.7
Colour: Pale green to dark green.
Streak: Not given.

Metatorbernite is a secondary mineral formed by the dehydration of torbernite during weathering. It only occurs directly above 75 degrees Centigrade. Metatorbenite distribution is widespread, occurring wherever torbernite is found. A primary deposit of Metatorbernite in the UK is found at the Gunnislake mine at Calstock in Cornwll.

The prefix 'meta' in a mineral name implies a lower level of water. Metatorbernite has eight water molecules whereas torbernite has eight to twelve water molecules.

The specimen shown in the picture comes from Margabal, Entraygue, Averyon, France.