A very rich group of metatorbernite crystals showing tetragonal forms and polysynthetic and echeloned growths, and classic green color. We can observe a yellowish fluorescence due to the presence of metautunite. This species is visible also as yellowish tones in the core of some exfoliated crystals.

When samples are mined and pull out of the mine, a partially dehydratation occurs (from 12 to 8 H2O molecules) and torbernite become metatorbernite species. Margabal specimens can be classified as metatorbernite.

Size: 5,4 x 4,5 x 4,2
Main crystal: 1,4 x 1,2 cm.
Found in 1989

Ex-col. Yvan Dissac
Fluorescent under long wave UV